This timeline provides a sociohistorical context for Diane Arbus's 1965 A young man and his pregnant wife in Washington Square Park, N.Y.C. 

Diane Arbus | A young man and his pregnant wife in Washington Square Park, N.Y.C. | The Metropolitan Museum of Art (metmuseum.org) 

This timeline provides a sociohistorical context for Lucian Freud's 1966 Naked Girl.