Confusion has arisen as to the precise source of Carr's three world wars scenario. As is the case with many of his claims, Carr did not provide a source for that scenario, but he mentions a letter written by Pike and addressed to Italian revolutionary leader Giuseppe Mazzini, which outlined a plan for unleashing "Nihilists and Atheists" after the end of World War III. The confusion increased when Michael Haupt launched his website threeworldwars.com, which mistakenly assumed that Carr also attributed the World War Three scenario to the Pike letter. In fact, the authenticity of that letter is disputed.