If military strategists are always fighting the last war, the same is true of those who work on countering radicalization. In 2001, Western intelligence services, mostly focused on localized terrorist groups like the Irish Republican Army and ETA, were stunned by al Qaeda. Come 2011, they were then blindsided by Anders Behring Breivik and the growth in far-right extremism. By the mid-2010s, the Islamist threat had evolved into the Islamic State — and they were slow to spot that, too. Today, we are about to make the same mistake. We will not easily forgive ourselves if our attention is exclusively occupied by the Islamic State or the far-right when the coming wave of environmental radicalization hits…