<p>Everything you need to know about why we have allergies</p>

Ep. 12: How Shirley Chisholm's 1972 campaign for president changed the face of politics

Your audio guide to everything you need to know about compelling and complex topics, from a variety of The Week's smart and witty writers, editors, and thinkers. Concise and entertaining, Seven-Minute Explainers packs a lot of information in a short amount of time.