I dont think the war in ukraine is an inter imperialist war, it is an anticolonial war started by the national bourgeoisie

Losurdo (2017):

The risk of a great war remains as a result of the efforts, on the part of the United States, to stop anti-colonial revolutions, and to construct a new colonial counter-revolution. The US stands opposed China, but we can also consider here the position of Russia. In my books I insist on a point which is perhaps neglected: the history of Russia in general — not just of Soviet Russia, but of Russia in general — is, on the one hand, the history of an imperial and expansionist power, but there is another aspect to this historical reality: Russia has been at risk of becoming a colony for a very long time. We all know about the invasions by Hitler, by Napoleon, by Charles XII, by the Mongols. For example, if we remit ourselves back to the beginning of the 17th century, it was the Polish who exercised power in Moscow. Immediately after World War I — after the defeat of Tsarist Russia — Russia was in danger of being balkanized, of becoming a colony. Here I quote Stalin, who said that the West saw Russia like they saw Central Africa, that they were trying to drag it into war for the sake of Western capitalism and imperialism. [2]

The end of the Cold War, with the West and the United States triumphant, once again put Russia at risk of becoming a colony. Massive privatization was not only a betrayal of the working classes of the Soviet Union and Russia, it was also a betrayal of the Russian nation itself. The West was trying to take over Russia’s massive energy deposits, and the US came very close to acquiring them. Here Yeltsin played the role of “great champion” for the Western colonization effort. Putin is not a communist, that much is clear, but he wants to stop this colonization, and seeks to reassert Russian power over its energy resources.

https://redsails.org/losurdo-and-opera/