All Abrahamic religions believe in the return of the savior, the liberator of the human beings and redeemer, in the End-Time. Prophets and divine messengers have promised the day that the whole universe will be full of justice and tenderness. Other religions also have similar beliefs, although they differ in some minor aspects, which will be discussed below. We go through references from different religions and faiths to examine their views about the last savior. 

Kalki: The Last Savior in Hinduism

In Upanishads, which is a collection of ancient Sanskrit texts that contain some of the central philosophical concepts and ideas of Hinduism, the last savior is called Kalki. He is believed to be the tenth avatar of Hindu god Vishnu in the last of the four stages in the endless cycle of existence known as "Samsara," which is defined "as the endless cycle of birth, death, and rebirth. Or as the world of suffering and dissatisfaction (dukkha)" [1].  He rides a white horse with a fiery sword. He will end the darkest and destructive period to remove adharma [i] and will usher in the Satya Yuga [ii][2]. 

Another reference talks about a just commander at the end-time who is the leader of angels and humans, who knows the truth and gets hold of everything from deep in the seas too high in the mountains, and no one greater than him will come to earth [3].

Saoshyant: The Eschatological Savior in Zoroastrianism

In Zoroastrianism, there are three saviors who each will rise in a thousand years. The last one is an eschatological savior figure who will destroy evil and will bring about the renovation of the world. He is called Saoshyant, which means the beneficent in its single form. Yet, in its plural form, it is considered to mean the redeemer. The Khorda Avesta describes this savior as such:

Whose name will be the victorious SAOSHYANT and whose name will be Astvat-ereta. He will be SAOSHYANT (the Beneficent One) because he will benefit the whole bodily world; he will be ASTVAT-ERETA (he who makes the bodily creatures rise up), because as a bodily creature and as a living creature he will stand against the destruction of the bodily creatures, to withstand the Druj of the two-footed brood, to withstand the evil done by the faithful. [4]
Accordingly, the Soashyant will rise at the end-time and fight against the vices in the world and spread justice and goodness far and wide. 

Maitreya: The Future Buddha

In some of the Buddhist references, such as the Amitabha Sutra and the Lotus Sutra, we read about the future Buddha of this world, called Maitreya, who will be a successor to the present Buddha. In Sanskrit, Maitreya means kindness and love. According to Buddhist religious texts, Maitreya will be the fifth and last Buddha who will appear on the earth. The arrival of Maitreya is expected at a time in the future when the dharma will have been forgotten by most on the earth. That is when Maitreya will appear on the earth to achieve complete enlightenment and to teach the pure dharma [5].

Li Hong: The Last Savior in Taoism

The Taoist last savior, called Li Hong, is depicted as an ideal leader who would reappear to set right heaven (tian) and earth (dì) at a time of upheaval and chaos. Li Hong will appear at the end of the world cycle to rescue the chosen people, who would be distinguished by certain talismans, practices, and virtues [6].

Savior in Abrahamic Religions

Moshiach: The Last Savior in Judaism

The Jews belief in the savior is manifested in the idea of the coming of Moshiach (i.e., Messiah). This person is believed to be a descendant of King David, who will "gather the Jews from all over the world and bring them back to the land of Israel" [7]. There are many verses in different scriptures and Talmudic [iii] literature which refer to this figure and enumerate his characteristics and manners [iv]. For instance, Isaiah says:

And there shall come forth a rod from the stock of Jesse [King David's father], and a branch shall grow from his roots; and the spirit of the Lord shall rest upon him, the spirit of wisdom and understanding, the spirit of counsel and might, the spirit of knowledge and of the fear of the Lord. And his delight shall be in fear of the Lord; and he shall not judge by what his eyes see, nor decide by what his ears hear. But with righteousness shall he judge the poor, and decide with equity for the humble of the earth; and he shall strike the earth with the rod of his mouth, and with the breath of his lips shall he slay the wicked.
–Isaiah 11:1-4

Those who follow Judaism believe that their savior has not been born yet. Therefore, they are eagerly awaiting the coming of the one who will save them and establish a just dominion in which "there will be world peace, no more wars nor famine, and, in general, a high standard of living" [7]. 

The Messiah: Jesus Christ (PBUH) the Savior of Mankind 

Christians believe that Jesus Christ (PBUH) is himself the savior of humankind, and he was born for this purpose. The name Christ literally means "the anointed one" or the Messiah [8]. As the Gospel of Matthew says, Jesus Christ (PBUH) has been sent to "Save his people from their sins" (1:20-21). It is also believed that Jesus Christ (PBUH) had been crucified to atone the sins of humanity and lead them toward salvation. According to Christian sources, Jesus Christ (PBUH) was the savior who was awaited by the Jews as whose coming was predicted in the Torah as the Moshiach. 

Another point which makes Jesus Christ (PBUH) the awaited savior in Christianity is the idea of his second coming or the Second Advent in the end-time to whose "day or hour no one knows, not even the angels in heaven, nor the Son, but only the Father" (Mark 13:32). This is the belief in "the future return of Christ in glory when it is understood that he will set up his kingdom, judge his enemies, and reward the faithful, living and dead" [9]. Different gospels, including Matthew chapters 24–25; Mark, chapter 13; Luke, chapter 21:5–26, and John, chapter 14:25–29, are mentioned as the evidence for this belief. Moreover, according to biblical verses, there will be many signs indicating the end-time among which the second coming of Jesus Christ (PBUH) and the last judgment. 

Therefore, like many other religions, Christians also believe in a savior or as they call it the Messiah, who will make this world a better place and free it from oppression and injustice. 

Imam Mahdi (AS): The Awaited Savior in Islam

In Islam, the belief in the savior is rooted in the fact that Allah never leaves His creatures, especially human beings, on their own and support them through sending His apostles to guide them toward the right path: "and there is a guide for every people" Quran (13:7). He had sent 124000 prophets (PBUT) first, followed by righteous leaders who continued the path of previously chosen messengers of Allah. As the Quran says, "Certainly We wrote in the Psalms, after the Torah: 'Indeed My righteous servants shall inherit the earth.'" (21:105).

 Therefore, the earth will never become empty of Allah's guide, and people will benefit from these guiding lights either directly or indirectly. Imam Mahdi (AS), the twelfth leader of Muslims and a descendant of Prophet Muhammad (PBUH&HP), who is leading a secret life at the time, will ultimately rise and spread peace and humanity throughout the earth. "The Holy Prophet (PBUH&HP) informed Muslims about his reappearance, telling his names, attributes, appellations, and peculiarities" [10]. The time of his coming is unknown, and it is followed by the preparation of particular circumstances. 

The signs that indicate his coming include "Widespread injustice and oppression, the advent of Dajjal (Anti-Christ) who would misguide the thinking of the people, the advent of Sufyani who is one of the pillars of mischief and corruption on the earth, the formation of the Islamic army, which would raise up black standards, the voice of the angel of the sky giving glad-tidings of his reappearance, the coming down on earth of Jesus Christ (PBUH) and his paying allegiance to and praying behind in congregation Prayers led by Imam Mahdi (AS)" [11]

This belief in the last savior, who would stand against tyranny and injustice and remind human beings of their real value, also, highlights Islam's optimism toward the future of the world.

Finally, we have reviewed the belief in the last savior or the person who will save humankind from the evilness and destruction in this world in different faiths and religions. On a more in-depth look, we can find many similarities between these beliefs. However, the Abrahamic religions had a more precise and more tangible attitude toward the idea of the last savior and the time of his coming. Therefore, the concept of the savior is one of the most essential and significant matters regarding the future of human destiny. 

Notes:
[i] Opposite to dharma, which includes unnaturalness, wrongness, evil, immorality, wickedness, and vice. 
[ii] The period when humanity will be governed by gods and every manifestation or work is close to the purest ideal, and humanity will allow intrinsic goodness to rule supreme.
[iii] The central text of Judaism and the primary source of the Jewish religion. 
[iv] Isaiah 2, 11, 42; 59:20, Jeremiah 23, 30, 33; 48:47; 49:39, Ezekiel 38:16, Hosea 3:4-3:5, Micah 4, Zephaniah 3:9, Zechariah 14:9, Daniel 10:14. 

References:

1. Samsara
2. the man on the white horse
3. The Vishnu Purana, trans. Horace Hayman Wilson, London: Trübner & co., Book IV, Chapter 24.
4. Khorda Avesta, Translated by James Darmesteter (From Sacred Books of the East, American Edition, 1898.), Part five
5. Buddhism
6. Anna K. Seidel. "Perfect Ruler in Early Taoist Messianism: Lao-tzu and Li Hung." History of Religions, Vol. 9, No. 2/3
7. The end of days
8. what does christ mean
9. second coming
10. Sayyid Ali al-Husayni al-Milani, The Promised Savior: An inquiry into the imamate of Imam Mahdi (as) from the viewpoint of Muslim thinkers, part 1, p.8. 
11. Baqir Shareef al-Qurashi, The Life of Imam al-Mahdi, Trans. Sayyid Athar Husayn S.H. Rizvi, p.259-283. Pdf. 

We keep hearing arguments about Islam from different people. Some question Islam as a real religion, and others try to prove that Islam is the true religion sent by God. However, I think that there is a major problem with these types of arguments. In fact, many people who undermine Islam by questioning it are not usually in search of truth. Rather, their sole goal is to humiliate Islam and make themselves happy with whatever belief they have. 

Although Islam encourages people not to accept anything without understanding, when it comes to the point where arguments and discussions have no learning point, and become only a waste of time, Islam orders Muslims not to argue with people who have no intention to learn and improve; “do not dispute concerning them, except for a seeming dispute”. (18: 22)

Therefore, in this text, I would not try to justify the validity of Islam for those who have no intention to consider Islam as a path in life. But I would like to share my amazing experiences of being a Muslim with those who are looking for a safe path in life. Also, I will explain why I believe that Islam is the most complete religion and guideline in the world. 

All Prophets were Muslims

Is that true to say all prophets from Adam, Abraham, Moses, Jesus to Prophet Muhammad (peace be upon them) were Muslims? Or is it just a tool that Muslims use to justify Islam as the best religion? To find the answer to this question, we must first understand what Islam is.  

The word Islam means submission, and Muslim is the person who is submitted to God and His divine orders. Now, let’s have a look at the following verses of the Quran that state all religions that have been sent by God were sent to make humankind submitted to God (Muslims).

Abraham (PBUH) as a Muslim

In Chapter Baqarah when the story of Abraham and his son Ishmael (PBUT) is narrated, while they are making the house of God in the current city of Makkah, they pray God to make them Submissive (Muslim) to Him: 

“As Abraham raised the foundations of the House with Ishmael, [they prayed]: ‘Our Lord, accept it from us! …. ‘Our Lord, make us submissive to You, and [raise] from our progeny a nation submissive to You …” (2: 127-8) And then in another chapter of the Quran, Allah informs believers that Islam first came from Abraham; “The faith of your father, Abraham. He named you ‘Muslims’.” (22: 78)

Also God orders the Prophet Muhammad (PBUH) to emphasize the fact that the religion he brought is the same as the religion of Abraham (PBUH): “(O Prophet!) Say, ‘Indeed my Lord has guided me to a straight path, the upright religion, the creed of Abraham, a Hanif, and he was not one of the polytheists.” (6: 161)

Moses, Josef (PBUH) and Other Prophets as Muslims 

Prophet Josef (Yusuf) (PBUH) prays to his lord to take his soul while he is a Muslim: “Let my death be in submission [to You], and unite me with the Righteous.” (12: 101)

“And Moses said, ‘O my people! If you have faith in Allah, put your trust in Him, if you have submitted [to Him].’” (10: 84) The last part of this verse in the Quran is written as “if you are Muslims.” 

“Say, ‘We have faith in Allah and in what has been sent down to us, and what was sent down to Abraham, Ishmael, Isaac, Jacob, and the Tribes, and that which Moses, Jesus, and the prophets were given by their Lord. We make no distinction between any of them, and to Him do we submit.” (3:84)

Every Religion Is Islam

According to what we discussed so far, we release that “all Prophets irrespective of the fact whether they had or did not have an independent code of law, had the same mission and preached the same message.” [1] The prophets came with the same message from God to guide human beings to the right path, and the nature of human beings in all eras are the same; “So set your heart as a person of pure faith on this religion, the original nature endowed by Allah according to which He originated mankind (There is no altering Allah’s creation; that is the upright religion, but most people do not know.)” (30: 30) 

And in another verse, it is explained that:  “Indeed, with Allah religion is Islam, and those who were given the Book did not differ except after knowledge had come to them, out of envy among themselves...” (3:19)

Therefore, the guideline that is sent for human in all eras should be the same, as the nature of human beings in all periods has been the same. There are some rulings in the Quran that may change according to the conditions of the time. Since, Islam is a universal religion, not a contextual one. 

“Should anyone follow a religion other than Islam, it shall never be accepted from him, and he will be among the losers in the Hereafter.” (3: 85)

Why Islam of Muhammad (PBUH&HP)?

Now that we discussed all the prophets were Muslims, and the only religion sent by God was Islam, why do we say that the religion of Prophet Muhammad (PBUH) should be followed, not the religion of Prophet Moses (PBUH) or Prophet Jesus (PBUH) or even prophet Abraham who was the father of Muslims?

It is said in the Quran that Prophet Muhammad (PBUH&HP) was a role model for humankind: “There is certainly a good exemplar for you in the Apostle of Allah—for those who look forward to Allah and the Last Day.” (33:21) 

While it is also stated in the Quran that Prophet Abraham and his followers such as Prophet Lout (PBUT) were role models for mankind: “There is certainly a good exemplar for you in Abraham and those who were with him, when they said to their own people, ‘Indeed we repudiate you and whatever you worship besides Allah.” (60: 4)

As mentioned before, Islam started with Prophet Abraham (PBUH), and he is named in the Quran as the father of Muslims. While in the above verse he is mentioned as a role model for Muslims. The same is with Prophet Muhammad (PBUH) who is called a role model for Muslims. Therefore, one can conclude that the only thing that makes the religion of Prophet Muhammad (PBUH) the last and most complete religion is the growth of this religion throughout the time. 

People’s intellectual immaturity was the main reason why God renewed his message and developed it over time. However, by the advent of Islam and revelation of the holy Quran, humanity had passed the period of its childhood and had become mature enough to preserve its intellectual heritage, i.e., the religion of God [2].

Scientific Signs in the Quran

There are many scientific points in the Quran that has been mentioned about 1400 years ago. These issues have been discovered by scientists only during the past 200 years.  I would mention a few examples and will leave the rest for you to study in the Quran. 

Embryology 

Issues regarding embryology have been mentioned in the Quran: “Certainly We created man from an extract of clay. Then We made him a drop of [seminal] fluid [lodged] in a secure abode. Then We created the drop of fluid as a clinging mass. Then We created the clinging mass as a fleshy tissue. Then We created the fleshy tissue as bones. Then We clothed the bones with flesh. Then We produced him as [yet] another creature.” (23: 14) and in another chapter, it is said: “created man from a clinging mass.” (96: 2)

Cosmology 

With regards to Big bang as the start of this universe, Allah says: “Have the faithless not regarded that the heavens and the earth were interwoven and We unraveled them, and We made every living thing out of water?” (21: 30)

Many years ago people believed that the shape of the earth was flat and they had a fear of falling down the edge of the earth at a point when the earth is finished! [3] While 1400 years ago in the Quran Allah says: “It is He who created the night and the day, the sun and the moon, each swimming in an orbit.” (21: 33) “Thereafter He spread out the earth” (79: 30), but He mentions that although the earth is not flat, we have created in a way that you can walk on it without the fear of falling down: “Allah has made the earth a vast expanse for you.” (71: 19)

Anthropology: Quranic Verses that Are against Human Rights 

One of the reasons that some people stand strongly against Islam is that they say there are some rules in the Quran that are against human rights. In answer to such arguments, one should ask ‘Who defines human rights?’

Human rights that we have in our era is created by human beings and does not go any higher than human understanding. When a human mind tries to create human rights, with the best considerations, they may always forget about some other aspects of human being and the atmosphere around him. Therefore there is no doubt that in many cases, human rights that are written by human beings may be against real human rights. 

Quranic verses that do not make sense

Having discussed all the above points, I sometimes come to a point where I cannot understand some points of the Holy Quran according to my logic. What to do at these times?
I assume that a sound mind would say that when most of something makes complete sense to you and amazes you for its incredibility, then for that one percent, maybe I should think that the problem is not with the book, but with my understanding. 

In the end, I would like to invite people to wisely think about their way of life, their goals, and aims in life. I would like to ask every human to read the Quran as a book that would definitely have many pints for human growth in it; shall it be scientific, moral, social or lifestyle points, it can help all of us to experience a better personal and social life. 

References: 

1. https://www.al-islam.org/printpdf/book/export/html/19182
2. https://www.salamislam.com