First of all... what period? because if you are talking about this time, I think it is becaise they want to feel powerful to be able to have more allied countries in any situation, they also do it because they want to control most of the world natural sources that other countries have.
Let's start off with what a brief explanation of what social stratification is; Social stratification is a persons ranking in society. Whether it be financial wise (the most common), the age group, education, and even family power. An early form of this could be the Roman Empire's hierarchical structure; they had the lowest class which would be the slaves and then would work their way up to the highest class which would be the Emperor.
I hope this helped.
The song dynasty succeeded in reunifying several kingdoms
Answer:
He believed Iraq had WMDs that Hussein might give to terrorists.
Explanation:
The answer would be agricultural
