Ian MacDougall Hacking is a Canadian philosopher specializing in the philosophy of science. He is sometimes described as a member of the “Stanford School” in philosophy of science, a group that also included John Dupré, Nancy Cartwright and Peter Galison. Hacking himself still identifies as a Cambridge analytic philosopher. Hacking has been a main proponent of a realism about science called “entity realism.” This form of realism encourages a realistic stance towards answers to the scientific unknowns hypothesized by mature sciences, but skepticism towards scientific theories. Hacking has also been influential in directing attention to the experimental and even engineering practices of science, and their relative autonomy from theory. Because of this, Hacking moved philosophical thinking a step further than the initial historical, but heavily theory-focused, turn of Kuhn and others.