The 1% Rule Of Large Groups

With over a billion Muslims in the world, al Qaeda could increase its ranks to 10 million if it convinced just 1 percent to join its movement — a force larger than any current army, and a force that could create a global insurgency that would turn the world into a nightmare.
—  Mark J. Penn
From his book: “Megatrends“
[By comparison, China has the largest standing army in the world with only 2.3 million. — KMAB]
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