A growing culture of Third Worldism—the belief that you’re entitled to use public spaces without any responsibility to care for them—is corroding civic life in cities. Immigrants from poor countries like my own, Venezuela, often joke that Americans complain too much about “First World problems.” Back home, we don’t worry about microaggressions; we’re too busy figuring out how to put food on the table or stay safe from crime and government censorship. But here’s the irony: increasingly, Americans aren’t complaining enough about Third World problems. Trash-strewn streets, loud music in public, brazen shoplifting, rising disorder, and a general decline in...