Brittney Griner’s release, nearly a year after Russian authorities detained her, is once more forcing a difficult question in Washington and other capitals. What is the least bad option in dealing with hostage diplomacy? The practice, which has grown somewhat more common in recent years, involves imprisoning a foreigner, usually on spurious or exaggerated charges, for the purpose of extracting concessions from that person’s government. For the victim’s government, giving in risks encouraging hostile states to take more hostages. But holding out prolongs the hostage’s suffering, as well as sending…