David Joseph Bohm FRS was an American theoretical physicist who contributed innovative and unorthodox ideas to quantum theory, philosophy of mind, and neuropsychology. He is widely considered to be one of the most significant theoretical physicists of the 20th century.
In physics, Bohm advanced the view that the old Cartesian model of reality was limited, in the light of developments in quantum physics. He developed in detail a mathematical and physical theory of implicate and explicate order to complement it.
Bohm warned of the dangers of rampant reason and technology, advocating instead the need for genuine supportive dialogue which he claimed could broaden and unify conflicting and troublesome divisions in the social world. In this his epistemology mirrored his ontological viewpoint.
He believed that the working of the brain, at the cellular level, obeyed the mathematics of some quantum effects. Therefore he postulated that thought was distributed and non-localised in the way that quantum entities do not readily fit into our conventional model of space and time.
Due to suspicions of Communism during the McCarthy era, Bohm left the United States. He pursued his scientific career in several countries, becoming a Brazilian, and later, a British citizen.