In 1962, the film version of Harper Lee’s famous book “To Kill a Mockingbird” was released to great acclaim.

The film won three Academy Awards, including a Best Actor nod for Gregory Peck.

At the core of the film, and perhaps its most memorable moment, is a long courtroom monologue from Peck where he discusses the relationship between different races in the United States. (Scroll down to see the clip.)

>>Related: Harper Lee's 10 most powerful quotes

Peck starred as Atticus Finch, a lawyer who was based on Lee’s own father. He is hired to defend an African American man who is being persecuted for kissing a white woman.

Finch’s closing argument touches on the notion that “all men are created equal” an argument that has resonated with audiences for more than 50 years.