As I stood in downtown Tulsa, Oklahoma I was amazed by the lushness of its greenery and sense of cosmopolitism. This was my first trip to Oklahoma, and in my naiveté, I had thought the whole state was one big Dust Bowl. Perhaps I had seen John Ford’s film adaption of John Steinbeck’s The Grapes of Wrath too many times, but that image had been branded in my mind.

In 1830, President Andrew Jackson pushed a new piece of legislation through Congress called the "Indian Removal Act." American-Indian tribes* were to give up their lands east of the Mississippi in exchange for lands to the west in Oklahoma. Jackson said that this was for the various tribes’ protection, but there was an ulterior motive...