Dr. Michael H. Stone, R.I.P

Dr. Michael H. Stone, a psychiatrist and scholar who sought to define evil and to differentiate its manifestations from the typical behavior of people who are mentally ill, died on Dec. 6 at his home in Manhattan. He was 90.

The cause was complications of a stroke he had in January, his son David said.

Dr. Stone was best known to the public as the author of the book “The Anatomy of Evil” (2009) and as the host from 2006 to 2008 of the television program “Most Evil,” for which he interviewed people imprisoned for murder to determine what motivated them to engage in an evil criminal act.

He ranked the acts on a 22-category scale of his creation. Modeled on Dante’s nine circles of hell, his taxonomic scale ranged from justifiable homicide to murders committed by people whose primary motivation was to torture their victims.

“Mike’s major contribution to psychiatry was sharpening the distinction between mental illness and evil,” Dr. Allen Frances. a former student of Dr. Stone’s who is now chairman emeritus of the department of psychiatry and behavioral sciences at Duke University School of Medicine in Durham, N.C., said in a phone interview.

Analyzing the biographies of more than 600 violent criminals, Dr. Stone identified two predominant personality traits: narcissism, to the point of having little or no ability to care about their victims; and aggression, in terms of exerting power over another person to inflict humiliation, suffering and death.

In 2000, Dr. Stone figured in a sensational murder trial that tested the limits of doctor-patient confidentiality. He wanted to testify in the murder trial of Robert Bierenbaum, a plastic surgeon and former patient of his who was accused of killing his wife, Gail Katz-Bierenbaum, in 1985.

Michael Howard Stone was born on Oct. 27, 1933, in Syracuse, N.Y., the grandson of Eastern European immigrants. His father, Moses Howard Stone, owned a wholesale paper business. His mother, Corinne (Gittleman) Stone, was a homemaker.

A prodigy who learned Latin and Greek as a child, he was only 10 years old when he began seventh grade. As the youngest and smallest student in the school, as well as the only Jewish one, he formed an alliance with a 17-year-old classmate who was a boxer, his son David said: Mike would do the classmate’s homework, and the classmate would protect him from local antisemitic bullies.

He entered Cornell University in Ithaca, N.Y., when he was 16, enrolling in a premedical curriculum but double-majoring in classics in case he was rejected by medical schools that had already met their quota of Jewish students. He enrolled in Cornell Medical School in Manhattan after graduating from Cornell in 1954 and received his medical degree in 1958.

He is survived by two sons, David and John Stone, from that marriage, which ended in divorce in 1978; his wife, Beth Eichstaedt; his stepchildren, Wendy Turner and Thomas Penders; three grandchildren; and one great-grandson.