William Cooper was the only man who had all the pieces of the puzzle. Sadly our future is gone due to his assassination by the US government. He knew our technological capability as well as our government involvement in illegal drugs.
So give John Perkins a break. If he told too much to the public, then the corporate jackals would come after him. To find out where whistleblowers are coming from, one should read the books that motivate them. Sadly their books are rarely available to buy or check out from the public library.