Explain Aquinas’ account of the three “basic inclinations” that form the backbone of his theory of natural law.

Explain Aquinas’ account of the three “basic inclinations” that form the backbone of his theory of natural law. As always, use textual references to support your explanations and please explain in some detail his arguments for these inclinations. Please note that this question is not asking whether you agree or disagree with Aquinas’ theory.