The Chinese first emperor united China by force. He governed by the concept of legalism which advocated clear rules and heavy penalties as a way of enforcing the state authority. On the other hand the Roman emperors ruled with a concept of people are good and therefore need to be good.
During the expansion of the Islamic caliphate, the Muslim
rule was often preferred to the Persian or the byzantine because of the main
reason that the caliphate extracts few taxes from its conquered populations
than the empire that it resides.
Europeans invaded Africa with the purpose of instilling Christianity into natives as well as introducing western ideas in education, medicine, hygiene, and monogamous marriage. The colonization of Africa was also of commercial interest. Africa provided European manufacturers with cheap labor, raw materials, and a ready market to purchase their products
In 1950s, popular cultures spread due to television and print media de-emphasizing women and other minorities. Idealized white people were presented with little (if any) allusion to diversity, poverty or conflicts (such as the Civil Rights Movement). Material values and compliance were things criticized by the counterculture; literature, the Beat movement and music (rock 'n' roll) came into conflict with the "tidy suburban view of life".