The video is not about John Mearsheimer. His picture is in the thumbnail, but I think that is merely intended as a visual representation of Realism, a dominant school of thought in international relations theory for a long time already, to which the video offers a critique.
Also, the video covers a lot more than the war in Ukraine.
As far as I can tell, this agreement has never existed.
Claim: NATO promised Russia it would not expand after the Cold War
Fact: Such an agreement was never made. NATO’s door has been open to new members since it was founded in 1949 – and that has never changed. This “Open Door Policy” is enshrined in Article 10 of NATO’s founding treaty, which says “any other European State in a position to further the principles of this Treaty and to contribute to the security of the North Atlantic” can apply for membership. Decisions on membership are taken by consensus among all Allies. No treaty signed by the United States, Europe and Russia included provisions on NATO membership.
The idea of NATO expansion beyond a united Germany was not on the agenda in 1989, particularly as the Warsaw Pact still existed. This was confirmed by Mikhail Gorbachev in an interview in 2014: “The topic of ‘NATO expansion’ was not discussed at all, and it wasn’t brought up in those years. I say this with full responsibility. Not a single Eastern European country raised the issue, not even after the Warsaw Pact ceased to exist in 1991. Western leaders didn’t bring it up, either.”
Declassified White House transcripts also reveal that, in 1997, Bill Clinton consistently refused Boris Yeltsin’s offer of a ‘gentlemen’s agreement’ that no former Soviet Republics would enter NATO: “I can’t make commitments on behalf of NATO, and I’m not going to be in the position myself of vetoing NATO expansion with respect to any country, much less letting you or anyone else do so…NATO operates by consensus.”
Do you have a link that confirms it exists (other than Putin claiming it exists)?
[Perhaps I should move a discussion on this video to 2023: “Things change, and they don’t change back.” - #401 by teapoweredrobot] Edit: I just did