Who developed the idea of uniformitarianism?

A. James Hutton

B. Nicholas Steno

C. William Smith

D. Georges Cuvier

The correct answer is James Hutton. This was the first thing that popped up on the web ...

The prevailing view at that time was that the Earth was created through supernatural means and had been affected by a series of catastrophic events such as the biblical Flood. This theory is called catastrophism. The ideas behind uniformitarianism originated with the work of Scottish geologist James Hutton.