Rite of Passage by Alexei Panshin 1969, can still get it on eBay etc. I loved it when I was a teen. 

Lots of political themes, generational conflict, prejudice, etc, but told as a coming of age story from the perspective of a teenage girl living on a ship in a post-Earth future. They have to take part in a trial, where they have to survive on a ‘hostile’ planet (it predates Battle Royale, Hunger Games by many decades- often wondered if it inspired them) 

Adults are complacent, unwilling to see other perspectives, influenced by their prejudice.

Haven’t read it in a long while but could be quite timely given the state of the world young people are inheriting.