"The lottery system took the local personalities out of the system," Flahavan said, adding that it was "much fairer, much more objective, more efficient."
Each day of the year was assigned a randomly drawn number from 1 to 365. So, for example, May 1 might be assigned No. 100, and men with May 1 birthdays would be called after those with birthdays assigned the numbers one to 99.
"It obviously was a big deal for young men who were of the appropriate age," Flahavan said. "And lotteries and birthdates meant a lot in those days and were tracked on all the campuses and so on."
The lottery was introduced as the war was winding down. In 1970, the draft called men with numbers through 195. The next year, it called up to 125, and by 1972, the military's needs were being satisfied with volunteers, he said.
Tarr led the Selective Service until May 1972 and then served a year as undersecretary of state for security assistance, a position that gave him responsibility for military programs with other nations. He left government service in 1973 and went on to work for Deere & Co., Cornell University and Intermet Corp., in a variety of management roles.
But Pam Tarr said there's no question that her father will be remembered for the lottery. People still approach her to show her their draft cards with her father's signature.
"I don't think he would say it was one of his great achievements, it was one of his greatest responsibilities," she said. "He was a very principled man, and in every position he had, he wanted to do what was right."
Tarr also had pushed to eliminate college deferments for the draft, believing they unfairly discriminated against the poor and those who were uneducated, she said. But Congress wouldn't approve that.
Tarr did reduce the number of conscientious objectors by changing the guidelines for who would qualify. He felt that there were many who weren't objecting on religious grounds but were simply opposed to the war, Pam Tarr said.
Born Sept. 18, 1924, in Stockton, Calif., to Esther Reed Tarr and Florence Tarr, he served with the U.S. Army in Europe during World War II. After leaving the military, he earned his bachelor's degree at Stanford University, a master's degree in business administration at Harvard University and his doctorate at Stanford. His dissertation focused on the armed services.
Tarr was named president of Lawrence College in Appleton, Wis., in 1963 and was instrumental in its merger with Milwaukee-Downer College, which formed Lawrence University. He also established the university's first overseas program, in Germany.
While at Lawrence, Tarr was appointed by Wisconsin Gov. Warren Knowles to lead a task force looking at the relationship between the state and local governments. That gained him notice in the Republican Party and eventually led to an appointment at the Pentagon. From there, he was named head of the Selective Service.
Tarr is survived by his second wife, Mary Katherine Tarr, and another daughter, Cynthia Tarr, of Sonoma, Calif., according to his daughter Pam Tarr, who lives in Valley Village, Calif.
His first wife, Elizabeth Tarr, died in September. They divorced in 1977.