Imam Jawad (AS) is the ninth Shiite Imam. His father is Imam Reza (AS), and his mother’s name is  Sabikah. His original name is “Muhammad,” but his epithet is “Jawad,” meaning “a very generous person.” He was born on 195 H (810 AC) in Medina. (1)

Generally, Shiite Imams carried prestige among their tribe and were respected by everyone. Many Shias believed that Imams were merely knowledgeable people who gained their knowledge only from their ancestors and they were not extraordinary. However, the imamate of Imam Jawad (AS) made all the Shias think differently and change their minds. He was only eight years old, when his father, Imam Reza (AS), was martyred. According to hadiths, the earth cannot be without an Imam. Accordingly, Imam Reza (AS) said:
The earth cannot be without any of us, Imams, whether he is known by the people or hidden from them. (2)

Shias didn’t know who would be their leader after Imam Reza (AS). But, he introduced Imam Jawad (AS) as his successor (3) and showed the Shias that “Imam” was not an ordinary person and he could be the leader of the whole Shias despite being young. 

Knowledge is a sign of imamate 

The hadiths suggest various signs for Imams so that we can differentiate between the truly chosen Imams by Allah and impostors. One of the most significant signs is that he is the most knowledgeable person of his time. 

Prophet Muhammad (PBUH & HP) said:
Do not try to teach something to Ahlul Bayt because they are far more knowledgeable than you. (4)
Regarding this, Imam Sadiq (AS) acknowledged:
Indeed Ali (AS) was a knowledgeable person whose knowledge will be passed to his successors and no knowledgeable person (an Imam) dies except to leave their knowledge to someone else. (5)
He also said:
The successor of an Imam attains the knowledge of the previous Imam in the last moment of his life. (6)

The debates of Imam Javad (AS) with religious scholars

Ma’mun was one of the Abbasid Caliphs who lived during the same period as Imam Reza (AS) and Imam Jawad (AS). During his caliphate, the Shia population increased dramatically which intimidated him. Due to this fact, he lied that Imam Reza (AS) was his successor and led people to believe that he was not an enemy of Shiite Imams. But at last, he killed Imam Reza (AS). After Imam Reza (AS), Imam Jawad (AS) was his most important enemy. He made Imam Jawad (AS) marry his daughter so that he could deceive people longer. 

Many of the Abbasid royalties were against Ma’mun’s decision, as they believed that the boy was too young and he wasn’t a knowledgeable person. Ma’mun proposed that they should test the knowledge of Imam Javad (AS), in order to show everyone how extraordinary he is. Imam Javad (AS) was only nine years old at that time. 

One of the most knowledgeable religious scholars in those times, Yahya ibn Aktham, volunteered to have a discussion and debate with Imam Javad (AS). 
During the discussion, Yahya ibn Aktham asked Imam Javad (AS) about a person who has killed an animal while making Hajj; what should he do? (During the Hajj ceremony, it is forbidden for the pilgrims to kill any creature).
Imam Jawad (AS) said that it depends: Did he kill it in Mecca or outside of it? Did he know about this law or not? Has he done it intentionally or unintentionally? Was he free or was he a slave? Was it his first time? Was it a bird or something else? Was it a small animal or a big one? Is he ashamed of what he did or not? Did he do it at night or during the day? Was it Umrah (a special type of Hajj) or regular Hajj? 
Yahya was so surprised that he couldn’t answer the twelve questions of Imam Jawad (AS), but instead, Imam Javad (AS) answered them one by one and explained the rules to everyone. 
Ma’mun told people that “Now do you see what I was telling you?” (7)
During another session, Yahya asked Imam Jawad (AS) about a hadith from the Prophet (PBUH & HP) that Sunni narrators had recorded. The hadith said “Once Gabriel came to the Prophet (PBUH & HP) and told him ‘O Muhammad! Allah told you to inform Abu-Bakr that I am satisfied with him. Is he satisfied as well?” Yahya questioned Imam Javad (AS) about the authenticity of this hadith.
Imam Jawad (AS) said, “I do not deny the privileges of Abu-Bakr … but this hadith is contrary to the verses of the Quran.” Imam Javad (AS) stated he wouldn’t deny the privileges of Abu-Bakr because he was surrounded by Sunnis and it was so dangerous for him to speak out against Abu-Bakr.
Then he said, “The holy Quran says 
‘Surely We have created man, and We know the promptings of his heart, and We are nearer to him than even his jugular vein.’ (50:16) 
Then why should Allah ask Abu-Bakr whether he is satisfied with him or not while Allah already knows it?”
Yahya referred to another hadith that claims Abu-Bakr and Umar on the earth are like Gabriel and Michael in the skies. 
Imam Javad (AS) said “This hadith cannot be accepted as well, because Gabriel and Michael never worshiped anyone except Allah, while Abu-Bakr and Umar spent most of their lives as polytheists and worshippers of idols.” 
Yahya added that Abu-Bakr and Umar are the lords of the elderly in Paradise.
Imam Javad (AS) stated that it is impossible as people in Paradise are all young not old. Umayyad dynasty made this fake hadith because they didn’t like the authentic one narrated by the Prophet (PBUH & HP) that reads, “Hassan (AS) and Hussain (AS) are the lords of young people in Paradise.” (8)
Yahya said it also has been narrated that Umar is the one who illuminates Paradise.
Imam Javad (AS) responded that it is also impossible. Do you think that Paradise is not illuminated by the Angles and Prophets like Adam (AS) and Muhammad (PBUH & HP) but rather by Umar?!
Yahya said it has been claimed that the angels talk with the tongue of Umar.
Imam Jawad (AS) said that he does not deny the privileges of Umar. However, Abu-Bakr was better than Umar as he said, “I have a Satan that sometimes tempts me, so if you see me deviating, stop me.” 
Yahya asked many other questions about Abu-Bakr and Umar, and Imam Javad (AS) answered them all. (9)   
Not only Imam Javad (AS) did not fail to answer the questions, but also, he posed more questions that even the most knowledgeable scholars felt incapable of disputing with Imam Javad (AS). These debates happened when Imam Javad (AS) was only 8 or 9 years old. 
As it might be apparent, Shiite Imams were extraordinarily knowledgeable, and their knowledge was given to them by God not by learning in classes and the like. They were the most knowledgeable individuals in their era regardless of their age.

Resources

1.  I’lam al-Vara, Sheikh at-Tabarsi, vol.2, pg.91
2.   Kamal ad-Din, Sheikh Saduq, vol.1, pg.202
3.  Al-Kafi, Sheikh Koleini, vol.1, pg.320
4. Mu’jam al-Kabir, at-Tabarani, vol.5, pg.166
5.  Al-Kafi, Sheikh Koleini, vol.1, pg.221
6.  Al-Kafi, Sheikh Koleini, vol.1, pg.275
7.  Al-Ih’tijaj, at-Tabarsi, vol.2, pg.444
8. Sunan al-Kubra, Nasa’i, vol.7, pg.460
9. Al-Ih’tijaj, at-Tabarsi, vol.2, pg.446-448
    

The religion of Islam is profoundly concerned with the social life of human beings, and its rules are set to be practiced on a large scale and in all aspects of humans’ life. Therefore, it is inseparable from the financial and political organization of society. So, Islam has built a system of economy compatible with any society [1] and practical at any given time.

Islam considers the economy as one of the most important aspects of social life, but not its sole purpose which has to be taken into account at the expense of ignoring or harming other aspects of human life. The typical and well-known economic concepts in Islam are Khums, Alms tax (Zakat), Usury (Riba), Mortmain property (Waqf), etc.

What Are the Characteristics of Practical Islamic Economy?

A healthy economy according to Islam is one that is vibrant and growing, advantageous for all kinds of people in the society, and free from favoritism and injustice. This is an economy in which a fair amount of income is earned through a sufficient amount of work which is beneficial both for the individuals and society.

Therefore, a Halal source of income -that is the money earned through acceptable ways in Islam- in Islamic society is earned through a job, which is compatible with public interests based on the sharia of Islam. On the contrary, the income earned by any demand regardless of its nature or its effect upon society is not considered Halal according to Islam. In other words, the demands must be for the benefit of humankind -not just materialistically but also spiritually- to result in a healthy and desirable income [2].

Despite many misunderstandings, Islam never condemns being wealthy or having a prosperous way of living[i]. Prophet Muhammad (PBUH) said: “Worshiping has seven parts and its best part is lawfully earning money”. Contrarily, producing wealth in lawful ways, legal trading, and spending money for personal matters without extravagance and prodigality -which is strictly forbidden in Islam- have been highly recommended [1].

However, it condemns putting financial needs and concerns above other things, living for the sake of gathering money and piling it up, not earning money to have a better life, which is apparently not achieved just by money. On the other hand, if money becomes a means for work, activity, and productivity, then it will result in a more satisfactory and peaceful life [2].

To conclude, the practical religion of Islam is in favor of a lively economy in which welfare is not restricted to a particular group in society, a typical feature of capitalistic societies. Moreover, wealth is distributed fairly but not equally and regardless of the amount and quality of the work they undertake - characteristic of a communistic economy-  among all kinds of people in the society.

It is a system that is continually developing, and each individual has an opportunity to put his or her talents into practice. In other words, social justice is the crucial factor of the Islamic financial organization. A perfect example of this kind of society can be easily depicted in the reign of Muslims’ great religious leader after Prophet Muhammad (PBUH), Imam Ali (AS) [ii]. 

Notes:

[i]. Money has been directly called “Kheir” which means “goodness” in the Quran (2:180).

[ii]. On the second day of his reign, Imam Ali (AS) told his people as an announcement of his way of distributing the commonwealth among the society that: “the wealth is God’s property. Thus it will be distributed equally betwixt you, and no one is regarded above the other in this distribution, and there will be the best reward for God-fearers on the Day of Judgement”. Also, he was severely criticized by the upper-class groups in society for his careful observance of neglected people and his similar behavior with all kinds of people from any economic background. 

References:

1. Sheykh Al-Saduq. Savab al-Aamal va Iqab al-Aamal.
2. Morteza Motahhari. Nazari bar Nezame Eghtesadye Islam (An Overview of Islamic Economic system). Tehran: Sadra Publication.