Philosopher's Index This link opens in a new windowThe Philosopher’s Index™, produced by the Philosopher’s Information Center, is a current and comprehensive bibliographic database covering scholarly research in all major fields of philosophy. The Philosopher’s Index, considered the most thorough index of journal literature on the subject, features author-written abstracts covering scholarly research published in journals and books, including contributions to anthologies and book reviews. The Philosopher’s Index contains research published since 1940 including over 680 journals from more than 50 countries with content representing a variety of languages.