What do you mean? They didn't have world-class scientists? They didn't compete in thermonuclear weapon race, with test of their own design (Sloika)? They didn't built world first nuclear power plant for the grid in Obninsk? They didn't participate in particles research, e.g. with invention of Tokamak? Did they steal all of that? Or you're just saying that whatever they did, early on they used most important data from spying? Learning from others, and spying for your adversaries both predate USSR by millenniums.
> And the all of it was fueled by grain stolen from Ukraine
You mean, different part of the same country specialized in different activities? Which grain was stolen - and by whom - from Ukraine (you mean, Ukrainian SSR?) when nuclear research was going on, mostly after WWII?
The did in fact have some, of course it was a huge place, but the theft of nuclear secrets is well documented, as are other episodes of industrial tech. In fact the Mitrokhin Archives[1] revealed that industrial espionage was one of the primary purposes of Soviet spying. For example in 1971 Agent TONDA gave the KBG two volumes of documents on micro electronic components developed in Tokyo for US aerospace use.
> Which grain was stolen - and by whom - from Ukraine (you mean, Ukrainian SSR?)
I'm referring of course to The Holodomor[2] which was executed at gun point and overseen by Moscow via the NKVD. The whole thing was used by Stalin to clear our rebellious Ukrainians and to fund industrialization.
What I'm saying is that a lot of touted Soviet achievements were built on a foundation of theft, slavery, and ethnic cleansing unrivaled since WWII.
> So you're condemning USSR as a whole, not just in the scope of this discussion?
Yes. I'm am 100% fully condemning the whole USSR for its full history. The purges, the Holodomor, forced relocations, anti-Jewish programs, the invasion of Czechoslovakia, all of it. The USSR condemned racism in the US while at the same time running an ethnic cleansing program across its whole land mass so massive and pitiless that it would have made an SS officer blush. They condemned colonialism and yet ran South Yemen as a colony until 1990. The evil didn't stop with Stalin, the repression just became a little more graceful.