Of equal importance as the development of pragmatism and instrumentalism, although more narrowly and professionally focused, was the development of realism, a view that argued for the independent existence of the material world in space and time. This movement began in the first decade of the twentieth century led by Harvard's neo‐realist, Ralph Perry. It continued with the more significant Critical Realists of the second decade of the century-George Santayana, Arthur Lovejoy, and Roy Wood Sellars. C.I. Lewis, the most important inter‐war philosopher and another Harvard professor, known for his conceptual pragmatism, also embraced realistic ideas. In the second half of the century, Wilfrid Sellars influentially defended this point of view.
Part III Professional Philosophy, 1912-2000; Chapter 11