How do all ideas spread in the ancient world?

Why did leaders such as siddhartha gautama abandon hinduism to createbuddhism around 500 bce:

From 1990 to 2008, by what percent did the world’s most developed economies cut their greenhouse gas emissions?

What was a cause of the boer war? a. conflicts between boers and bantu c. disputes over land ownership b. conflicts over water rights d. desire to control the region's mineral wealth select the best answer from the choices provided a b c d