Discussion board forum #3: from a society with slaves to a slave

Celebrated historian Ira Berlin (shown below), wrote a book about the evolution of colonial slavery entitled:  Many Thousands Gone.  In it, he makes the assertion that by the time we get to the year 1690, colonial America had transformed from a “society with slaves” to a “slave society.”  Based on your readings and interaction with course materials, what do you think Dr. Berlin meant by that statement?  Was he right?  Why or why not?