Just wanted to share this definition for socialism (in my second comment) I came up with as a way of answering this person I was talking with on reddit:
The Soviet Union made the [ecological] choices it made while trying to withstand the external existential-threat-level pressure of U.S. imperialism and the internal struggle, which was caused by the war-torn origins of the country and exacerbated by the pains that had to be taken to resist that external pressure.
The west used the same justification to crank up the MIC. All empires have used it.
The point is to ask whether global socialism–a world that has been unified by the common desire for an end to empires and imperialism and an attempt to permanently enact that end through a historically novel socioeconomic arrangement–might get different results from an empire.