The document discusses several major empires and events in history:
1) Alexander the Great created a large European empire seeking peace and religious harmony. Rome offered civilization and laws but also strived for domination. The Roman Empire eventually fell due to invasions, economic troubles, and loss of virtue.
2) Early Portuguese voyages to Africa sponsored exploration hoping to find riches. Europeans then explored and colonized other parts of the world, spreading Christianity through missionaries.
3) All major empires practiced slavery until the 19th century. Between 1492-1820, over 5 times as many Africans went to America than Europeans in the transatlantic slave trade. Slavery was eventually abolished