He was at his most effective in the 1920s, on the attack against H. G. Wells's "The Outline of History", in which he criticised Wells' secular bias and his belief in evolution by means of natural selection, a theory that Belloc asserted had been completely discredited. Wells remarked that "Debating Mr. Belloc is like arguing with a hailstorm". Belloc's review of "Outline of History" famously observed that Wells' book was a powerful and well-written volume, "up until the appearance of Man, that is, somewhere around page seven." Wells responded with a small book, "Mr. Belloc Objects". Not to be outdone, Belloc followed with, "Mr. Belloc Still Objects."