Don E. Crabtree (June 8, 1912 – November 16, 1980) was an American flintknapper and pioneering experimental archaeologist. Known as the "dean of American flintknappers" he was mostly self-educated, however he was awarded an honorary doctorate degree by the University of Idaho. His 1972 publication An Introduction to Flintworking still serves as one of the primary terminology sources for students of lithic technology. Crabtree is known for "Crabtree's Law", which states that "the greater the degree of final finishing applied to a stone artifact, whether by flaking, grinding, and/or polishing, the harder it is to conclude the lithic reduction process which produced the stone artifact". Through practical experimentation and study of archaeological finds (both completed tools and the chips of stone left by their production) Crabtree learned to produce replicas of a variety of different ancient flint and obsidian blades. Life and death Don E. Crabtree was born in Heyburn, Idaho on June 8, 1912. He finished high school in Twin Falls in 1930, after which he worked for the Idaho Power Company. After a brief period he traveled to California where he enrolled in Long Beach Junior College in the mid-1930s with the intent to major in geology and paleontology. Crabtree was noted as being a thinker-while-doing, highly active, and not enjoying studying; due to this he dropped out of Long Beach Junior College after only one term to go his own route. In 1939 he discovered he had cancer, and this discovery briefly impeded his self-study in archeology. During the war years he met his wife, Evelyn, and married in 1943 while working for the Bethlehem Steel Company in California. Crabtree would spend the next 30 years educating and assisting some of the biggest names in archeology at the time such as Alfred Kroeber. Crabtree was also asked for his advice at influential sites like the Clovis type site. After a highly successful career he died in Twin Falls, Idaho on November 16, 1980 of complications due to heart disease. Employment history After graduation from high school Don Crabtree first worked for the Idaho Power Company. After dropping out of Long Beach Junior College in California he began working in paleontological laboratories. By the late 1930s he was the preparator in the vertebrate paleontology laboratory at the University of California, Berkeley. It was during this time he became acquainted with Alfred L. Kroeber and E. W. Gifford of