How do we know that some people of African descent were not slaves in spains american colonies​

What do u think caused the size of the roman empire to change

How did the french and british differ in the tactics they used to control there empires in asia

The author of the article, arthur brooks, has been president of the american enterprise institute since 2009, an organization committed to protecting free enterprise in the united states. he is the author of several books, including "the road to freedom: how to win the fight for free enterprise."