File photo of Niall Ferguson addressing the financial collapse of 2008 at the Newseum in Washington

 
File photo of Niall Ferguson addressing the financial collapse of 2008 at the Newseum in Washington
Historian Niall Ferguson addresses the financial collapse of 2008 at the Newseum in Washington in this October 1, 2009 file photo. Harvard historian Niall Ferguson posted an "unqualified apology" on his personal blog on May 4, 2013 after making comments that the British economist John Maynard Keynes didn't care about the future because he was gay and did not have children. REUTERS/Jonathan Ernst/Files