Sociologist Rodney Stark investigated the individuals who made the most significant scientific contributions between 1543 and 1680 A.D., the time of the Scientific Revolution. In Stark's list of 52 top scientific contributors, only one (Edmund Halley) was a skeptic and another (Paracelsus) was a pantheist. The other 50 were Christians, 30 of whom could be characterized as being devout Christians. Stark believes that the Enlightenment was a ploy by "militant atheists" to claim credit for the rise of science.