Michael Tomasello is an American developmental psychologist known for his research on the cognitive and social development of children. He has focused on how children learn language and acquire social skills, emphasizing the role of cooperation and shared intentions in human development. His work has contributed significantly to the fields of psychology and linguistics. Tomasello is also recognized for his studies comparing human cognition with that of other primates, particularly chimpanzees. He argues that unique aspects of human cognition, such as the ability to understand others' perspectives, are crucial for cultural learning. His findings have implications for understanding evolutionary psychology and the origins of human culture.