[6] Partly because of his poor health, he tended not to practise as a physician, his interests lying in the deeper problems of medical and physiological science.

Of the death of Mirabeau, Cabanis drew up a detailed narrative, intended as a justification of his treatment of the case.

He was enthusiastic about the French Revolution and became a member of the Council of Five Hundred and then of the Senate, and the dissolution of the Directory was the result of a motion which he made to that effect.

Psychology is with Cabanis directly linked on to biology, for sensibility, the fundamental fact, is the highest grade of life and the lowest of intelligence.

Stahl, and in the posthumous work, Lettre sur les causes premières (1824), the consequences of this opinion became clear.

Life is something added to the organism: over and above the universally diffused sensibility there is some living and productive power to which we give the name of Nature.

[citation needed] In 1786, Cabanis was elected an international member of the American Philosophical Society in Philadelphia.

Historian Martin S. Staum has written that: In a simple statement of adaptation and selection theory, Cabanis argued that species that have escaped extinction "have had successively to bend and conform to sequences of circumstances, from which apparently were born, in each particular circumstance, other entirely new species, better adjusted to the new order of things.