Hitler was a dictator who took pleasure and found satisfaction in the feeling of control. In his mind, the world would flourish and benefit if all of man was the same. This was the mentality and the leadership that lead to the Holocaust.
What are the choices to choose from
People in the south used slaves because their economy was focussed on things like cash crops (tobacco, cotton, etc.) These crops required a lot of work so farmers and plantation owners could not do it by themselves. So by using enslave persons they could harvest more crops, sell more, make more money, and in return boost the southern economy.
Development of the middle class, i hope that helped
In Common Sense, Thomas Paine argues for American independence. His argument begins with more general, theoretical reflections about government and religion, then progresses onto the specifics of the colonial situation. ... Government has its origins in the evil of man and is therefore a necessary evil at best.