"Apathetic" is not really a word I'd use to describe most Americans I know, especially the working class. "Informed but powerless" is more like it. Nihilism is the likely result of this sort of learned helplessness from a lifetime growing up in an unresponsive democracy. From the get-go, our foundational systems emphasized wealth over democracy. It was a system designed to empower a certain type and class of people, to liberate them from the English Crown's influence, but not really a democracy for all. Through our history, we've consistently encouraged wealth creation and resource exploitation/monopolization over democratic participation, and where democratic advances were made, they happened against strong headwinds and strong oppression from the wealthy. Slave owners, robber barons, industrialists, tech owners... this has never been a society friendly to the common person.