This timeline is developed to answer the following question.
What would happen if Alexander the Great had died as a child? No worldwide conquests? No fall of the Persian Empire? No Creation of the Selucid, Ptolemaic, or Mauryan Empires?
To take a brief look at these questions, here are some answers.
The Persian Empire continues on, and eventually conquers all of India, Greece, and large portions of Central Asia. Israel and Aegyptus both become independent in the 1st Century B.
C. Joshua of Nazareth (Jesus) is crucified by the pharisees and Christianity becomes the state religion of Rome in the year 95 A.D. Persia supports Carthage in its conflict with Rome, and because of this Carthage continues to exist until 152 A.D. The Roman Empire and the Persian Empires both go through many wars and by 302 A.D. Rome controls all of the Mediterranean (with the exception of Aegyptus) and most of Europe. Rome survives the Hunnic Invasion of the early 400s. Islam never develops. By the 600s, both Rome and Persia have fragmented into smaller states. The new Roman states still pay homage to the Emperor though, and the Emperor becomes a religious not a political position (similar to the Pope of OTL).
The Middle Ages
Contact with Sinoa (China) comes, and the Persian Empire is able to renunite in the year 823 A.D. The Norse (who achieved independence from Rome in the 450s) begin colonizing OTL Canada.
More to come