Michael Spivak is an American mathematician known for his work in the fields of mathematics and mathematical education. He is particularly recognized for his contributions to differential geometry and general relativity. Spivak is also the author of several influential textbooks, including the well-regarded series titled Calculus on Manifolds. In addition to his research, Spivak is a professor at Bard College and has been involved in promoting mathematical understanding through his teaching. His approach emphasizes clarity and rigor, making complex concepts accessible to students. Spivak's influence extends beyond academia, as he has inspired many through his writings and lectures.