25 years ago, IR scholar Dan Drezner wrote the book _The Sanctions Paradox_ which tried to explain, in an IR theory sort of way, why sanctions are used so often and achieve so little- they don't overthrow governments, they rarely even manage to make governments stop doing the things we don't like.
He recently revisited that in FP magazine (https://foreignpolicy.com/2025/09/10/sanctions-paradox-russi...) arguing for keeping sanctions on Russia even though they clearly aren't going to coerce Russia into abandoning their war in Ukraine. The first reason is to re-enforce the global norm against territorial expansion. We've managed to go 80-odd years with a reasonable global norm against redrawing borders, and it is worth a lot to demonstrate that we- the global community- do not acquiesce. And the other reason is to weaken their economy for the grinding war of attrition that is currently happening, and not make territorial expansion easy for them.
He recently revisited that in FP magazine (https://foreignpolicy.com/2025/09/10/sanctions-paradox-russi...) arguing for keeping sanctions on Russia even though they clearly aren't going to coerce Russia into abandoning their war in Ukraine. The first reason is to re-enforce the global norm against territorial expansion. We've managed to go 80-odd years with a reasonable global norm against redrawing borders, and it is worth a lot to demonstrate that we- the global community- do not acquiesce. And the other reason is to weaken their economy for the grinding war of attrition that is currently happening, and not make territorial expansion easy for them.