Abstract
Experimental philosophy (or “x-phi”) is a way of doing philosophy. It is “traditional”
philosophy, but with a little something extra: In addition to the expected philosophical arguments
and engagement, x-phi involves the use of empirical methods to test the empirical claims that
arise. This extra bit strikes some as a new, perhaps radical, addition to philosophical practice. We
don’t think so. As this chapter will show, empirical claims have been common across the history
of Western philosophy, as have appeals to empirical observation in attempting to support or
subvert these claims. While conceptions of philosophy have changed over time, across these
changes we find philosophers employing empirical methods in pursuing their philosophical
questions. Our primary aim in this chapter is to illustrate this fact. We begin by discussing the
relevance of history to experimental philosophy (Section 2), then offer a necessarily condensed
and highly selective history of empirical work in Western philosophy, ranging from the ancients
(Section 3), to the early moderns (Section 4), to the late moderns (Section 5), and on to the
present (Section 6).