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Ralph Caplan (January 4, 1925 – June 4, 2020) was an American design consultant, writer, and public speaker.
After his discharge from the Marines, Caplan re-entered Earlham College, graduated, and went for his master's degree at Indiana University. He later taught at Wabash College, then moved to New York City, where he became editor of Industrial Design. He left ID to write his first book, a novel, Say Yes, which was loosely inspired by his experience at Earlham and Wabash.
Author of By Design: Why There Are No Locks on the Bathroom Doors in the Hotel Louis XIV and Other Object Lessons, Caplan also wrote about design for major design magazines and was a director emeritus of the International Design Conference in Aspen, Colorado. He is the author of The Design of Herman Miller, and was a consultant to that Michigan furniture manufacturer for more than 20 years. His book, Cracking the Whip, published in 2006, is a selection of his essays on design and its side effects.
Caplan taught design criticism at the School of Visual Arts in New York, and wrote for various print and online journals. He died in Manhattan, New York from heart failure at the age of 95 in June 2020.
- Green, Penelope. Recalling I.D., a Beacon in Design. The New York Times. January 7, 2010.
- Green, Penelope (June 15, 2020). "Ralph Caplan, Design Critic Big on Sit-Ins but Not Chairs, Dies at 95". The New York Times. Retrieved June 15, 2020.