Iran’s response to the surprise Israeli and U.S. bombardment that started 12 days ago has upended trade routes, choked supplies of fuel and fertilizer coming out of the Gulf and threatened air traffic through one of the world’s most-traveled regions. Both sides have dug in, hoping to outlast the other.

For more than 100 years, the Chicago Council on Global Affairs has sought to play a positive role in helping to shape American foreign policy and its engagement with the world.