Olaf Tollefsen

{{short description|American philosopher}}

{{Infobox philosopher

|region = Western philosophy

|era = 21st-century philosophy

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|name = Olaf Tollefsen

|birth_date = March 4, 1944

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|death_date = September 13, 1989

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| institutions =St. Anselm College, Mount St. Mary's College (Emmitsburg, Maryland)

|main_interests = ethics, aesthetics, philosophy of science

| thesis_title = Verification Procedures in Dialectical Metaphysics

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| thesis_year = 1970

| doctoral_advisor = Germain Grisez

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|notable_ideas = new natural law theory{{cite web |title=New Natural Law Theory |url=https://www.nlnrac.org/contemporary/new-natural-law-theory.html |website=Natural Law, Natural Rights, and American Constitutionalism}}

|parents = Olaf Tollefsen, Frances Tollefsen

| spouse = Maureen Elizabeth Foley

| children = 4 boys (Christopher, Eric, Ian, and John); 3 girls (Jenna, Sarah, and Maurya)

| education = Georgetown University (PhD), University of Scranton (BA)

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Olaf P. Tollefsen (March 4, 1944 – September 13, 1989) was an American philosopher and Professor of Philosophy at St. Anselm College.

He is known for his works on aesthetics, ethics and the philosophy of science.{{cite web |title=The Way of the Lord Jesus: Olaf P. Tollefsen |url=http://www.twotlj.org/olaf_tollefsen.html |website=The Way of the Lord Jesus}}{{cite journal |title=REVIEW ARTICLE: Free Choice: A Self-Referential Argument by J. M. Boyle, Jr., G. Grisez, and O. Tollefsen |journal=Review of Metaphysics|url=https://philarchive.org/archive/BARRAF-3}}{{cite journal |last1=Bradley |first1=Gerard |title=Forum Juridicum: Church Autonomy in the Constitutional Order - The End of Church and State? |journal=Journal Articles |date=1 January 1989 |url=https://scholarship.law.nd.edu/law_faculty_scholarship/634}}