After these 2500 Years
The direct root of today's major schools of philosophy and religions started 2500 years ago.
Around 500 BC (Origins of contemporary philosophy and religion):
The Greek philosopher Socrates was born c. 470/469 B.C., in Athens. The Buddha died in 543 BC. The first five books – Genesis, Exodus, Leviticus, book of Numbers and Deuteronomy – of the Old Testament reached their present form in the Persian period (538–332 BC). The Chinese philosopher Confucius died in 479 BC. The Greek philosopher Socrates was born c. 470/469 B.C., in Athens.
Around AD 1 (Start of the holy bimillennium):
And then 2000 years ago, God sent Christ Jesus to Israelites whose religion faced a crisis. Since then, the world history evolved distinctly through each era of 500 years.
1 to 500 (Rise of Christianity):
Christianity expanded from Palestine to the whole Roman Empire's territory and beyond. Great reformation of Europe was going on in the post-Roman Empire Europe.
500 to 1000 (Former Middle Ages and the rise of Islam):
The Vatican and Christian churches expanded to hold hegemony in Europe. However, due to flaws in Christian doctrines, God gave Islam to Arabs and other tribes, leading to establishment of the Umayyad Caliphate and the Abbasid Caliphate.
1000 to 1500 (Latter Middle Ages and split of the Islamic world): The Vatican's power culminated so as to launch the crusaders against Muslims that were prevailing in the Middle East and around the Mediterranean. But soon worldly powers of European emperors and kings took advantage while Catholic churches became tainted. The Islamic world lost its integrity and the Islamic hegemony shifted from the Abbasid Caliphate to Seljuk, the Timur Empire and the Ottoman Empire.
1500 to 2000 (Industrial revolution to modern technology):
The Vatican started to built St. Peter's Basilica while Luther launched Protestantism against the Vatican authority. Columbus sailed the Atlantic to reach America, and Europeans started to colonize Africa and Asia. Modern typography invented by Gutenberg paved the way for great intellectual development in Europe. Following scientific development symbolized by Newton, etc., the Industrial Revolution started in England and then in Europe, the US, and Japan. Then modern capitalism and commercialism prevailed over great wars such as WWI, WWII, and the Cold War. Meanwhile Christianity has lost its binding influence on Westerners while modern science has been advancing with Einstein and many successive followers with support of advanced technology. Friction between Westerners and Muslims has been intensified.
Now, the world seems to reach the limit in which integrity and soundness of humanity are secured by the effect of various schools of philosophy and religions that have emerged in these 2500 years while modern economy and technology are expanding in a boundless manner.
In this context, the mankind is facing a crisis like an ape holding advanced weapons without knowing how to control them. So, God should interfere with the mankind again like He send Christ Jesus 2000 years ago.
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Mar 6:7 And he called unto him the twelve, and began to send them forth by two and two; and gave them power over unclean spirits;
Mar 6:8 And commanded them that they should take nothing for their journey, save a staff only; no scrip, no bread, no money in their purse: