Albert Einstein claimed he never thought of the future. “It comes soon enough,” he said. FOREIGN POLICY decided to not grant 16 leading thinkers that luxury. Instead, to mark our 35th anniversary, we asked them to speculate on the ideas, values, and institutions the world takes for granted that may disappear in the next 35 years. Their answers range from fields as diverse as morals and religion to geopolitics and technology. We may be happy to see some of these “endangered species” make an exit, but others will be mourned. All of them will leave a mark.