I love mankind; it’s people I can’t stand.” The saturnine wisdom of Charles M. Schulz’s immortal Peanuts comic strip is impossible not to recall when reading Mark R. Levin’s new blockbuster, Ameritopia.1 For one thing, there is the sheer Schadenfreude of imagining how the people at the The New York Times, those notorious lovers of humankind, must have reacted upon learning that a new book by the popular conservative radio host would debut at number one on the paper’s bestseller list—the slot Levin’s last book, Liberty and Tyranny, owned for more weeks than the Gray Lady cares to remember.

Linus’s snark, more to the point, marks the scrimmage-line in the epic struggle Levin depicts. On one side ...