In lecture three, Dr. Biggar delves into the complex topic of racism within the context of the British Empire, examining various historical examples and drawing nuanced distinctions between racism, patronizing attitudes, and cultural aloofness. The lecture emphasizes that, while the British Empire did contain instances of racial prejudice and discrimination, it cannot be fairly characterized as centrally or essentially racist, as it also demonstrated respect, admiration, and genuine benevolence toward native peoples, driven by a conviction in the basic human equality of all races.