The BBC covers the Peanuts exhibit going on over in the UK at Somerset House by having its writer reflect on the deeper meanings of Charles Schulz’s work.
From the story:
Schulz drew Peanuts during some turbulent decades in America, marked by the Korean War (1950-3); the Vietnam War (America entered in 1965 and the war ended in 1975); the Cold War; the constant clashes associated with the Civil Rights movement; the assassinations of John F Kennedy and Dr Martin Luther King Jr. The unassailably cool Snoopy became a sort of cult mascot among US soldiers in the Vietnam War, emblazoned on equipment, patches and banners; a little bit of Minnesota, to comfort them in hell.
http://www.bbc.com/culture/story/20181112-good-grief-the-beguiling-philosophy-of-peanuts
https://www.somersethouse.org.uk/whats-on/good-grief-charlie-brown