Prophet Muhammad (PBUH&HP) was the last messenger of Allah Almighty sent to human beings to guide them towards a more prosperous and meaningful life: "O Prophet! Indeed, We have sent you as a witness, as a bearer of good news and as a warner. and as a summoner to Allah by His permission, and as a radiant lamp." (33:45-46). 

You might be interested to know more details on his delegation (be' tha). So, follow us to find out more.

1. How did Prophet Muhammad (PBUH&HP) Receive his First Revelation?

Prophet Muhammad (PBUH&HP) was born into the tribe of Quraysh, one of the prominent tribes of Mecca. He was known as an honest and faithful man such that he was called Al-Amin [i], meaning trustee. 
He used to spend some hours alone out of town in Hira cave to worship, contemplate and reflect the state of people of that time and the aspects of creation. It was during one of these occasions that he received the divine message of prophethood. He was nearly 40 at that time. It was Rajab the 27th on 610 CE that the Archangel Gabriel (Jibreel) appeared before him and said: "Read." Muhammad (PBUH&HP) replied: "I am not able to read." This was repeated two more times. Then, the angel Gabriel recited the first verses of the Quran:

"Recite in the name of your Lord who created -
Created man from a clinging substance. 
Recite, and your Lord is the Most Generous –
Who taught by the pen -
Taught man that which he knew not." (96:1-5)

And, his mission started there.

2. How Was the Condition of the People in that Era?

According to Imam Ali (AS), Allah Almighty sent Prophet Muhammad (PBUH&HP) as a warner (against vice) for all the worlds and a trustee of His revelation. That was while the people of his time were following the worst religion. They resided among rough stones and venomous serpents, drank dirty water and ate filthy food, shed each other's blood, and did not care about their relationships. They worshiped and respected Idols, and sins were clinging to them [1].

3. Who Testified to the prophethood of Muhammad (PBUH&HP) First?

Imam Ali (AS) sometimes accompanied Prophet Muhammad (PBUH&HP) when he went to Hira cave. And, the day that the Archangel Gabriel appeared before the Prophet (PBUH&HP), Imam Ali (AS) was there, too. Prophet Muhammad (PBUH&HP) said to Imam Ali (AS) that: "O Ali, you see all that I see and you hear all that I hear, except that you are not a Prophet, but you are a vicegerent and you are surely on (the path of) virtue." [3].

Afterward, being perplexed by this happening, Prophet Muhammad (PBUH&HP) went home to describe what has happened to his wife, Khadija (AS). She (AS) was the first woman who testified to the prophethood of Muhammad (PBUH&HP). And according to the authentic resources, the first man was Ali (AS) [2]. Imam Ali (AS) has described the situation like this: "In those days Islam did not exist in any house except that of the Prophet of Allah (PBUH&HP) and Khadijah (AS), while I was the third after these two." [3].

4. How Did people react to Prophet Muhammad (PBUH&HP) Claim about His Prophethood?

In the beginning and according to divine guidelines, Prophet Muhammad (PBUH&HP) did not reveal his revelations publicly. Still, it was confined to a small circle of his family, close friends, and whoever he thought was eligible. In this period, the aim was to find real loyal fellows, although few. Of course, polytheists found about it, but they did not take it seriously [4].  

Three years later, Prophet Muhammad (PBUH&HP) began to preach to his clan members by receiving the command to "Warn the nearest of your kinsfolk" (26:214). But he mostly received ridicule and mockery. Allah Almighty ordered him not to give up and make his mission publicly known: "So proclaim what you have been commanded, and turn away from the polytheists" (15:94).

The rich people of Mecca saw their power and wealth in danger with the ideas that Muhammad's (PBUH&HP) new religion proposed like social equality, sharing the wealth with needy people, and rejecting idols. On the contrary, people of the lower classes, slaves, and women were those who embraced Islam very soon [4]. 

According to the details above, Prophet Muhammad (PBUH&HP) was chosen by Allah almighty at the time when humanity was at its dawn, and morality was long disappeared among humankind. He was the one who once more reminded human beings of the concept of humanity and the reason for creation.

Notes:

[i] In the "Age of Ignorance" (before the advent of Prophet Muhammad (PBUH&HP)), people did not trust each other much and did not care about the safekeeping of others' affairs. But, everyone in Mecca trusted Prophet Muhammad (PBUH&HP), and when they went to business travels, they entrusted their valuable goods to him. So, he was given the nickname "Al-Amin." And, this title continued to be used for the Prophet (PBUH&HP) after the emergence of Islam, too, although some people had become against him since he fought idolatry. 

References:

1. "Nahjul Balaqah", Sermon 26.
2.  Allamah Amini, “Al-Ghadir”, vol. 3, p. 236.
3. "Nahjul Balaqah", Sermon 192.
4.  Jafar Morteza Amoli, “Al-Sahih Min Sirat Al-Nabi Al-Azam”

Those who do not know Islam very well and those who follow the propaganda of the media, especially in this period of time when several terrorist attacks have been committed by pseudo-Muslim groups, which do not have anything to do with Islam, accuse Islam of encouraging violence and terror. That is absolutely wrong. Islam is the religion of peace and intrinsically promotes peace. The reasons for that will be reviewed next. 

Islam Communicates Intersubjectivity

The greatest miracle of Islam is the Quran; a Book. Books are among the most efficient and prominent means of connecting thoughts and minds. This means that Islam has chosen a very civilized way of communication with human beings; by having dialogues with them. By the means of the Quran, Islam, in the first place, deals with the thinking power of humans and then their emotions. In other words, Islam tries to communicate with people through common sense, mutual understanding, logic and reasoning which consequently prevents harshness or sudden actions caused by the outpouring of emotions. That is while “Book” and “communicating through words” did not serve like that regarding the previous divine religions [i].  

Islam Promotes Adherence to Rules and Regulations

According to Islam, one should truly believe in the Islamic principles and axioms. It means that one should accept these Islamic facts by reasoning and rational search and demonstrate his\her belief in every act and deed; otherwise, if one has not really changed his\her mind to accept Islam or accepts Islam in words but do not practice it, he\she will be a “Muslim” but not a “believer” (Mu'min). This shows that Islam educates the people who are adherent to rational and commonsensical rules and regulations and consequently prevents apostasy and chaos. 

Golden Rule[ii], promoted by Islam

Many suppose that Immanuel Kant was the first who formed and introduced the Golden Rule, a rule of ethical conduct, while this ethical code has been among the teachings of Islam since 1400 years ago. Imam Ali (AS) and other Imams (AS) have emphasized this ethical advice by words and acts and encouraged people not to consider themselves superior to others or do not prefer their benefits to others [1]. 

Imam Ali (AS) has addressed Imam Hassan (AS) as such: “What you prefer for yourself, prefer for others; what you find objectionable for yourself, treat as such for others. Don’t wrong to anyone, just as you don't like to be wronged; do good to others just as you would like others to do good to you; that which you consider immoral for others, consider immoral for yourself” [2]. There is no sign of injustice or cruelty among these words. On the contrary, this is an invitation to get along with others, to respect their preferences and not to expect too much from them. This is simply an encouragement to peace. 

Islam and Holy Struggle (Jihad)

When hearing about Jihad, the first thing that strikes to mind is Al-Qaeda, ISIS and fire, and blood. Many people think that Jihad equals aggression, but that is wrong. Jihad has a clear definition. There exist two types of Jihad in Islam: Defensive and Offensive. Defensive Jihad, as can be guessed from the name, is for the aim of defending the Islamic territory against the assaults and intrusions of outsiders and invaders.

Offensive Jihad aims at liberating people from unjust oppressive regimes and allowing them to search, read and choose the right religion and lifestyle. Many Islamic jurists believe that the Offensive Jihad to invite to Islam is only allowed under certain circumstances; i.e. in the presence of the Imams (AS) and Prophet Muhammad (PBUH&HP). Otherwise, only Defensive Jihad is permitted which is actually obligatory to all Muslims in whatever condition. No one in the whole wide world would admit that defending oneself is aggression; Neither do the Muslims. Then, it is clear that unlike a widespread thought nowadays, Islam is against war and violence.

Islam Considers the Rights of Others over One in peace

There is a theory in Islam: any harm to others or oneself is banned. It explains that a Muslim does not cause any harm to other people or do not misuse rules to cause harm to them [2]. Through this theory, Islam protects the benefits and rights of others. This includes any individual or any group of people. It also covers both Muslim and non-Muslim societies and people, hence, this theory, in fact, reinforces and advertises the peace all around the world.

One Has Rights over Him\Herself

It was explained above that Islam also bans any harm to oneself. In this regard, suicide is illegal (Haram) in Islam. Some might suppose that they own their physical body while it is a divine trust offered to us to do good deeds (16:97), worship God (51:56) and practice the religion. This is another means by which Islam promotes peace all around the world.   

Considering the Islamic approach described above in interaction with the humans, the efforts to establish ethical standards and to form the interrelationship among humans demonstrate the contribution and role of Islam to create a peaceful world.   

Notes:
 
[i] While Old Testament and New Testament are written by humans, the Quran is the divine revelation to Prophet Muhammad (PBUH).
[ii] Golden Rule is the principle of treating others as one would wish to be treated.

References:

1. Nahj al-Balaqa, Letter 31.
2. peace in islam