The Atlas Society is proud to offer the original Nathaniel Branden Institute (NBI) lecture series for download. The lectures, which began in 1960, were originally provided as recordings, and distributed around the country for those who could not attend a live NBI lecture. Entitled Basic Principles of Objectivism the lectures present Ayn Rand's philosophy as well as Nathaniel Branden's application of Objectivism to his own field, psychology.