 These close traits indicates a likeness with Australo-Melanesians.The main controversy concerning the 'Two Layer' hypothesis is whether or not the evolutionary process truly involved the Australo-Melanesians.Archaeologists such as Matsumura suggest Southern Chinese people comprised the initial population of Southeast Asia, rather than Australo-Melanesians while researchers such as Turner argue that prehistoric Southeast Asians did not mix with either racial group.