Alan Donagan was an influential philosopher of the 20th century, distinguished for his theories on the history of philosophy and the nature of morality. He is most well known for his book "The Theory of Morality" (1977) where he tries to argue for the common morality of the Hebrew-Christian

Christian

A Christian is a person who adheres to Christianity, an Abrahamic, monotheistic religion based on the life and teachings of Jesus of Nazareth as recorded in the Canonical gospels and the letters of the New Testament...

 traditions which Thomas Aquinas

Thomas Aquinas

Thomas Aquinas, O.P. , also Thomas of Aquin or Aquino, was an Italian Dominican priest of the Catholic Church, and an immensely influential philosopher and theologian in the tradition of scholasticism, known as Doctor Angelicus, Doctor Communis, or Doctor Universalis...

 and Immanuel Kant

Immanuel Kant

Immanuel Kant was a German philosopher from Königsberg , researching, lecturing and writing on philosophy and anthropology at the end of the 18th Century Enlightenment....

shared. Unlike many of his contemporaries, he was deeply committed to the history of law and ethics which led him to conceptual issues that arise out of practical reflections on moral and juridical issues.
Volume 104, No.1 of The Journal Ethics was dedicated in honor of his philosophy.

Writings

• The Theory of Morality 2nd Ed with corrections 1979