To what extent were the massive inequalities of second-wave (classical) civilizations generally accepted, and in what ways were they resisted or challenged

The massive inequalities of second-wave (classical) civilizations  was accepted because of the philosophical religious systems. These systems, which included Greek rationalism, Hindu faith, and Confucian philosophy, supported inequality.  

In China, Confucianism was used to justify the class system and patriarchy. Also, Aristotle developed the notion that some people were "slaves by nature" and should be enslaved for their own good and for that of the larger society.

Finally, the social inequity was both accepted and resisted in classical civilizations. Some evidence supporting this statement is the fact that people who disagree with Confucianism fought back with Daoism and the fact that strong states like China served to strengthen social inequality.  

in 1803 the louisiana purchase took place, doubling the size of the country. by 1840 almost 7 million americans had migrated westward in hopes of securing land and being prosperous. the belief that settlers were destined to expand to the west is often referred to as manifest destiny.

explanation:

studies show tha in 7.5 billion years from now, the expanding sun will engulf, and destroy, the earth.