During the Early Middle Ages in Europe, warfare frequently occurred.
There
were invasions by Vikings, Magyars, Germanic barbarians, and Muslims, and this caused war outbreaks.
Catholicism has always been a huge religion, and has been in control of the world for previous ages. For that reason, they were the ones who could dictate when to start the timeline, and chose the birth of Christ as that starting point.
Answer:
This innovation greatly increased crop yields simply by inserting the seeds into the ground. ... Both of these major innovations helped in overall agricultural productivity.
