For most of the 20th century, much of the western academic world believed in the Out of Africa theory of human evolution. The theory proposes that Homins evolved in Africa until the emergence of Homo erectus around 2 million years ago. About 1.4 million years ago Homo erectus left Africa and spread throughout Europe and Asia. In Europe, Homo erectus evolved into the Neanderthals. In Asia, most Homo erectus stopped evolving. Unlike most of the Homo erectus in new Asian environments, which stagnated, the Homo erectus that stayed in Africa continued to evolve and eventually became Homo sapiens. Around 300,000 years ago, waves of Homo Sapiens started leaving Africa where they spread throughout the globe and conquered or out-competed Neanderthals and Homo erectus. According to the theory, the last Neanderthal died out around 30,000 years ago. The last Homo erectus died out somewhere between 200,000 and 30,000 years ago. In the new mellenum, the Out of Africa theory has ben debunked. Firstly, genetic testing of Neanderthal DNA has found that it contruted to the genome of for all humans outside of Africa. This demntrated that neandrthals were not a unique spcies and could in fct breed with Homo sapiens. Fossiles have also shown that the Homo erectus in Asia did not stop evolving as suggested. Homo flo. Denoivans. Australia also has a signficant number of fossils and arcahic DNA that have potential to illunimate the human evolutionary story; however, the interpretations are beingstunted by some of the adherents to the Out of Africa model who exploit aboriginal politics to resist revision of their theories and life's work.