Tweet: "A digital act of war has happened," says Tristan Harris, co-founder of the Center for Humane Technology, to @emilychangtv about rising polarization and violence on social media. Tweet: ... "digital act of war. Social Dilemma star @tristanharris says Facebook and Twitter are making $$ not just by manipulating us but dividing us into "cult factories." Tweet by @mytweetmark: "trafficking signals". Tweet by @hillaryclinton: "Thinking about the children in Flint". Tweet by @mytweetmark: "Thinking twitter users vs children in flint". Tweet by @startupljackson: "Rich people complain about advertising. Poor people complain about bills". Tweet by @mytweetmark: "Rich people complaint about him. Poor people complaint about her."