What do the history of physics, the international women's movement, microfinance, the modern philosophical novel, and the fight against the spread of AIDS in Africa all have in common? According to Joe Loewenstein, professor of English and director of the Interdisciplinary Project in the Humanities, in order to study any of these topics and countless others, students are well-advised to begin the slow and rewarding process of mastering a foreign language. The important question becomes, which languages open which doors of opportunity?The audio for this podcast was originally recorded as part of a video project promoting foreign language study in Arts & Sciences at Washington University in St. Louis.