After 4 years of Donald Trump, the US must "reassure" its allies.

That's what I'm reading/hearing lately, such as in this @nytimes piece. What do international relations scholars know about reassuring allies? Can it be done? Is it even

This passage from the article captures well the call for "reassurance": the US must convince its allies in Asia and Europe that the US would indeed use its nukes to protect them.

That's a tall order!

Indeed, such a tall order that it's been a major question explored by international relations scholars for a long time. A LONG TIME.

The topic was of keen debate in the 1950s, with Henry Kissinger writing a series of pieces on the topic, such as this 1956 @ForeignAffairs

The academic discussion picked up in the late 1950s and early 1960s.

This included Robert Schelling's paper in the first issue of the Journal of Conflict