The document discusses the influence of Charles Darwin's theories on geography, particularly in geomorphology, human geography, cultural landscapes, and political geography. It highlights how Darwin's concepts of evolution were adapted by geographers like William Morris Davis and Friedrich Ratzel, shaping ideas such as the geographic cycle and 'lebensraum.' Additionally, it touches on the emergence of social Darwinism, which misapplied Darwin's principles to justify various social and political ideologies.