Antonio Escobar y Mendoza (1589 – 4 July 1669) was the leading ethicist of his time.
Born at Valladolid in Castile, he was educated by Jesuits before entering this order, aged fifteen.
He soon became a famous preacher, and his facility was so great that for fifty years he preached daily, and sometimes twice a day. Above all he was a prodigious writer: his collected works comprise eighty-three volumes. Escobar's first literary efforts were Latin verses in praise of Ignatius Loyola (1613) and Mary (1618), but his principal works focus on exegesis and moral theology. Of the latter the best-known are Summula casuum conscientiae (1627), Liber theologiae moralis (1644) and Universae theologiae moralis problemata (1652–1666). He used to employ the most popular ethical method called casuistry, analyzing real situations rather than strict rules.
Escobar's Summula received criticism from so-called rigorists, especially a jansenist Blaise Pascal who wrote Provincial Letters. Pascal coined the famous maxim that purity of intention may be a justification of actions which are in themselves contrary to the moral code and to human laws, and its general tendency is to find excuses for human weakness. Escobar's doctrines were also disapproved by some conservative Catholics, however he was very appreciated by the mainstream. Molière subjected Escobar to ridicule in his customary witty style, and Escobar was also the target of criticism by Boileau and La Fontaine. By the 18th and in the 19th century, in France the name Escobar had become synonymous with "adroitness in making the rules of morality harmonize with self-interest".