Season 1 Episode 4.

The "Second Great Debate" was a dispute between "scientific IR" scholars who sought to refine scientific methods of inquiry in international relations theory and those who insisted on a more historicist/interpretative approach to international relations theory. The debate is termed "realists versus behaviourists" or "traditionalism versus scientism".

- Stefano Guzzini (1998) on Realism in international relations and international political economy: the continuing story of a death foretold