I highly recommend checking out Myron Medcalf's piece up on the Strib's page. Here is a taste...
The man who died on that balcony in Memphis was a human being beset by doubts and concerns about the future of the civil rights movement. The man who died on that balcony was changing and beginning to embrace a universal Poor People's Campaign — he recruited poor whites, too — that cited capitalism and the hoarding of resources as a threat to all. The man who died on that balcony, if you believe the accounts of those close to him, had wrestled with depression and seemed to know he would die soon. As King pursued equality, America nearly broke him.