Class 2 y history of psych y rise of mechanism: descartes, 1600. proposed the idea of the body as a machine using the technology of the time (hydraulics ect. ) humans then started being described as complicated machines: mind body dualism. humans are different from animals thanks to the mind which is non-physical but somehow interacts with the body. without sufficient predation or disease populations will boom run out of food and collapse y functionalism: william james. studied medicine went through emotional crisis of determinism vs. free will. he descried thinking as a dynamic relationship between organisms and their environment. argued psychology should be a practical science focused on improving human welfare. habit- much of what we do is due to past choices y 20th century: psychology starts to separate into schools of though battling for supremacy.