Mass protests have raged since the global financial crisis of 2008. Across the world students and workers and environmentalists are taking to the streets. Discontent is seething even in the wealthiest countries, as the world saw with Occupy Wall Street in 2011. Protest Inc. tells a disturbingly different story of global activism. As millions of grassroots activists rally against capitalism, activism more broadly is increasingly mirroring business management and echoing calls for market-based...