During this time, he collaborated with Albert R. Jonsen to write The Abuse of Casuistry: A History of Moral Reasoning (1988), which demonstrates the procedures for resolving moral cases.
Under denna tid samarbetade han med Albert R. Jonsen i boken The Abuse of Casuistry: A History of Moral Reasoning (1988), i vilken de demonstrerar sätt att lösa konfliktartade etiska processer.