The quote "People are gregarious by necessity" from Diana Gabaldon's "Outlander" highlights the inherent social nature of humans. It suggests that individuals seek companionship and connection as a fundamental part of their existence. This need for social interaction is essential not just for emotional well-being but also for survival within communities.

In the context of the story, this notion reflects the characters' struggles and the importance of relationships in overcoming adversity. Through their challenges and experiences, Gabaldon illustrates how people rely on one another for support, which reinforces the idea that human connections are vital to navigate life's complexities.