If you’ve got around fifteen spare minutes, take a look at John Oliver’s newest Last Week Tonight segment on the American prison system. His rant highlights the absurdities and atrocities of American penal culture, whether it’s our lack of empathy for prison rape or extreme racial profiling in drug offenses, through cutting humor. Oliver attacks the subject with the blunt honesty the problem deserves, even if it often goes unacknowledged. And the Muppets help out.