Enabled documentation of many important ideas, as it later spread to many other areas. This event best falls into the category of Technology, and this specific advance is still in use today.
By it's name it is not hard to see that is is a religious concept, but the ideas of Buddhism influenced the ruling powers of this time. Also Buddhism is still prevalent in China today.
The Silk Road Interlinked Asia with the Mediterranean and European world. In a sense, this event is not in a specific category, but it helped to facilitate two of them. The silk Road helped spread religion, most namely Islam, Buddhism, and Christianity. Also the Silk Road spread extremely important technology such as paper and gunpowder. If it had to fit one category, the main overarching one would be technology because it was a trade route and it focused on goods and new technology, whereas the religion was a facet of the Silk Road exsisting.
Muhammad was the founder of Islam, as he preached his encounters that he had with the Angel. This is a major figure of the Islamic Religion, and his teachings are obviously still used today.
The rule of the Sui and Tang dynasty, was the golden age of china. During this time they were the most politically and economically sound they had ever been, and their culture boomed. Most important category would most likely be economics because they were so sound financially, with innovation and culture blooming.
The Quran was compiled as a result of the angel Gabriel and his visits with Muhammad, Though this is yet another religious concept, it influenced gender roles because it specifically outlines that men and women are equal in the eyes of God.
This was spread through both violent and nonviolent conquest of the Arabian world. This is yet another major religious movement that influenced gender, politics, and economics.
This once again religious concept has had ramifications for recent times. The religion is still divided into these sects, and no convergence seems to ever be possible.
This is a gender role that helps to explain gender in china during this time period. Women were no where close to equal in China, and the gruesome process of foot binding exhibits this.
This is also and extremely important advance in technology. This impacted warfare the rest of the time period and is still relevant today, just not in the same form.
This split of Christianity into Roman Catholic and Eastern Orthodoxy still exists today even though Jesus warned against a split. This is a big deal and the two sides continue to try to converge sometime in the future.
This religious event was used to spread Christianity even though it was a gruesome affair in which lives were lost. In the end, the crusades did not have a major impact on the Islamic world, but it is still remembered as an important time in history.
This gender role came to a shock in places that the Mongols conquered such as China. This also a big deal because basically the rest of the world were more restrictive on women than the Mongols were.
The Mongol Empire was the largest contiguous land empire in human history. The empire was united by Temujin also known as Chinggis Khan helped to conquer lands such as Persia, Russia, and China marked by a strong military. This was obviously a very political feat for a pastoralist society.
The Plague devastated Eurasia and specifically the Mongol Empire, which in end led to the destruction of them. In the end the plague destroyed approximately 1/2 of Europe's population. Even though it is not constrained to one category it fits religion in a sense that people looked towards it in danger, and it vastly affected the politics of the region.
The Ming dynasty helped to restore China after the Mongols, and during this time China shunned outside influence as it did for years to come. This political and economical feat once again established China as a force to be reckoned with, especially from a naval view under Emperor Yongle.
Timur died in 1404 and so did the idea of a restoration of the Mongol Empire. This is a politically important moment in history because it marks the last great military successes of nomads.
The European Renaissance in Europe began in Italy around 1400. This marked a bloom in economics especially in Europe, but also many aspects of culture.
This created the idea of men and women working in separate but equal spheres of life. All around women had a significant amount of more rights in this time period.
This marked the end of the Roman Empire whom many believe were the greatest empire the world had ever seen. It was also a major blow to Christendom, because the capital became Islamic, thus fitting religion and politics.
Columbus voyages' were all for wealth and when he finally reached America nothing else changed. This is also important obviously because today America is a world power.
The creation of the Mughal Empire brought about a political and religious event. First the Mughal empire brought about what is known as the second flowering of Islam, But it also became known as an imperial power on the subcontinent of India.