William Krehm (November 23, 1913 – April 19, 2019) was a Canadian author, journalist, political activist and real estate developer. He was a prominent Trotskyist activist in the 1930s and went to Spain where he participated in the Spanish Civil War. In the 1980s he co-founded the Committee on Monetary and Economic Reform (COMER) and continued as the group's principal leader until his death in April 2019 at the age of 105.[1][2]