Peter Ludlow is a professor of philosophy at Northwestern University. Before moving to Northwestern, Ludlow taught at University of Toronto, the University of Michigan and the State University of New York at Stony Brook. He has done much interdisciplinary work on the interface of linguistics and philosophy—in particular on the philosophical foundations of Noam Chomsky's theory of generative linguistics and on the foundations of the theory of meaning in linguistic semantics. He has worked on the application of analytic philosophy of language to topics in epistemology, metaphysics and logic, among other areas.

Ludlow’s research includes conceptual issues in cyberspace, particularly questions about cyber-rights and the emergence of laws and governance structures in and for virtual communities, including online games. In recent years, Ludlow has written nonacademic essays on hacktivist culture and related phenomena such as WikiLeaks.

Ludlow received his B.A. from Bethel College and his Ph.D. in philosophy from Columbia University under the direction of Charles Parsons. He also studied with Noam Chomsky and James Higginbotham at MIT.