Explain what caused the rise of new ideologies such as socialism, capitalism, and communism (consider why did these ideologies arise in the 1750-1900 time period and not earlier?)

you didn't list the options. however, a few communist countries today are: the people's republic of china, north korea, and cuba.

after the aryan's settled in india they changed for the better i bellieve they changed from nomads having to keep moving to being farmers   they were aswell avaible to turn the ganges river into farmland.   which is great they added a big affect on farming as we know of it today.

not all were fit for battle and were weak.