"Ethics, Demonstrated in Geometrical Order (Latin: Ethica, ordine geometrico demonstrata), usually known as "The Ethics", is a philosophical treatise written by Benedict de Spinoza. It was written between 1664 and 1665 and was first published in 1677.

Benedict de Spinoza was a Dutch philosopher of Sephardi/Portuguese origin.

Translated by R. H. M. Elwes.