People you’ve probably never heard of are meeting behind closed doors in cities such as New York, Madrid, Johannesburg, Punta del Este and Kuala Lumpur. Hailing from more than 100 countries, they’re laying the foundations for unprecedented changes around the globe. But I’m not talking about the United Nations or the World Economic Forum. Leftist journalists say this “shadowy” network should terrify you. A Guardian columnist recently claimed that although this movement may appear to be “a wild and improbable conspiracy theory,” its participants “steer policy around the world.” Why are leftists more alarmed than usual? Because this little-known international...