Answer:
because many more people which was 1/6 population of world were in huge crusis
Explanation:
it influences the world's economy
I think it's commerce, but it could be agriculture.
the traditional religion of Japan that focuses on ritual practices to be carried out diligently to establish a connection between present-day Japan and its ancient past.
Not necessarily their land is not occupied right now but they still terrorize people. But it could have influenced the creation of such groups due to a foreign people with different beliefs and tradition came into their lands.