Although it unfortunately has been forgotten by many, Jesus preached a message of peace and cooperation, most notably embodied in the phrase" love thy neighbor". It spread because people were refreshed by his words.
The world war two broke out when Germany invaded Poland. Britain and France consequently declared war on Germany to enforce the terms of the Versailles treaty. but they were already late because their appeasement policy had already served to militarize and arm Germany.
What are the answer choices
High mountains and access to water (the sea, not rivers) meant that
navies were critical for war and trade.
This also meant that the different city states of Ancient Greece were
physically separated from each other.
This allowed each culture to have similarities (like language and
religion), but also significant differences like the Spartan vs. Athens
systems. This also led to a particular
type of farming and a limited ability to fight in open plains. Hence the Hoplite system with phalanxes
became dominant.
Yes, The birth rate of most of Europe has slowed greatly and with instability in Africa and the Middle East has caused many refugees to flock to the stable and economical prosperous Europe.