Hitchens enlists the help of world's 'greats' to support argument that God is not Great.

Christopher Hitchens believes it is time to disabuse people of several notions.

Mark Twain did not believe in God, Americans are not uncritically devout and an atheist can be president of the United States.

In fact, the extent of religion's hold on people, the British-born author, journalist and provocateur says, has been vastly exaggerated. Despite polls that suggest differently, people are not as religious as many think, he told The Associated Press in an interview.

"I knew that the zeitgeist of religion was changing _ that the parties of God would piss people off in their various forms: Republican or Shiite," Hitchens said.

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