With the Taliban in power in Afghanistan, there’s a new enemy ascending.
The Islamic State (IS) group threatens to usher in another violent phase. Except this time the former insurgents, the Taliban, play the role of the state, now that the U.S. troops and their allied Afghan government are gone.
The Taliban promised the United States to keep the extremist group in check during successive rounds of peace talks. Under the 2020 U.S.-Taliban...