Agenda 21: It’s the biggest threat to your freedom, and unless you regularly attend yahoo-filled local planning and zoning meetings, you’ve probably never even heard of it. Until recently, this 20-year-old United Nations plan to promote “sustainable development” was known only to stalwart defenders of Liberty and Freedom like the John Birch Society. But the underground resistance is about to go mainstream. GOP intellectual it boy Ted Cruz leads the counterstrike, and the Republican Party is even considering a public flambéing of Agenda 21 in its official 2012 platform.

Looking to help break the siege of bike paths and high-quality education on our freedoms? Here’s what you’ll need to know.

Want more? Read all 400+ pages of Agenda 21 on the U.N.’s website, or check out these past stories in Grist:

• Paranoia strikes deep: GOP exposes ‘dangerous’ U.N. sustainability plot
• Of soccer moms and sinister U.N. plots
• Ted Cruz, Tea Party’s new Latino hero, is a bit loony on green issues