Adam McKay and David Sirota’s Don’t Look Up, about a planet-killing comet on a rapid crash course with Earth and an America that is too distracted to do anything about it, is an allegory for our inaction on climate change. As a satire of government corruption, billionaire egomania, and celebrity culture, it is effective. And while the message is critical, the focus on parody sometimes comes at the expense of fleshing out the characters.