In an America notable for its faith, there is still plenty of disbelief to go around. The novelist Michael Crichton, who died recently, went to his grave disbelieving in global warming. In one of his last books Crichton argued that the science supporting climate change was shaky and that we would only be saddling future generations with huge debts to solve an environmental problem that might not exist.
The president of Iran famously disbelieves in the Holocaust, a skepticism that is prompted by his antagonism toward Israel. There are still Americans who disbelieve in NASA's moon landings, unmoved by photographs and testimony by the astronauts.
Although the pope himself is comfortable with a belief in Charles Darwin's theory of evolution, plenty of Christians part with him, disbelieving that God could possibly have chosen to create humankind that way.
Skeptics rarely spend much money persuading believers that popular faiths are unfounded, so it is newsworthy when a group of prominent American atheists mount a missionary effort to unburden the rest of us of our belief in God's existence.