PDF: https://conservancy.umn.edu/bitstream/handle/11299/107275/oh...
The last time we had a debate on HN on this topic a number of people seemed to think it would have been a good idea - which I found genuinely disturbing. Hopefully I was just being trolled.
"The total death toll as calculated by the Joint Chiefs, from a U.S. first strike aimed primarily at the Soviet Union and China, would be roughly 600 million dead. A hundred Holocausts.
I remember what I thought when I held the single sheet with the graph on it. I thought, this piece of paper should not exist. It should never have existed. Not in America. Not anywhere, ever. It depicted evil beyond any human project that had ever existed. There should be nothing on Earth, nothing real, that it referred to."
https://apjjf.org/-Daniel-Ellsberg/3222/article.html
Edit: The staggering thing about the estimate of 600 million dead was that this was known to be an underestimate as the US didn't take the thermal effects of nuclear weapons into account during planning as they were regarded as too unpredictable. Actual 'real' estimates would be over a billion dead....
Now you might be overestimating the US nuclear arsenal at the time, remember he died in 1957. At the time a nuclear exchange could have killed a lot of people, but only on the scale of a major bombing campaign not glassing the country.
As such, assuming US attacked and occupied Russia after an early nuclear exchange, it would have been war but not fit the definition of genocide because the intent to destroy a people simply wasn’t there.
PS: One of the less well known examples, the US forcibly sending American Indian children to boarding schools to be Americanized actually fits the UN definition of genocide. That’s the heart of the issue, the intent to destroy a people or culture rather than say conquest or even retaliation.
Edit: I suspect maximum lethality of the US stockpile would have been during the 1960s when they still used large numbers of very large and dirty weapons.
Thus, even 10 million dead in 1950 seems very high unless they simply tried to maximize civilian casualties which it’s self would reasonably qualify as genocide. And again Russia lost ~27 million people in WWII and it isn’t considered a genocide of Russia so numbers alone while horrific don’t qualify.
In the end the world avoided a large scale nuclear exchange, but when faced with a seemingly like war between two nuclear armed superpowers I can understand the argument.
Though frequently quoted as evidence that von Neumann favoured a first strike "preventive war" against the Soviet Union, this is a weak reed on which to build such a claim. It seems more likely it was characteristic - though tasteless and bloodthirsty - banter designed to emphasise his hawkishness. ...
Von Neumann was not an unthinking militarist: he believed that the world's only chance of avoiding destructive conflict was world government, but - since he could not see any practical way of achieving this - he was determined to defend his adopted country with as much armed might as possible. "
http://www.math.uwaterloo.ca/~hwolkowi//neumann1.html
Unlike Teller, von Neumann is not renowned for what you describe as "persistent advocacy" of nuclear first strike. AFAIK, von Neumann was not especially politically active in promoting US gov't aggression of any kind, again, unlike Teller.
Seems more or less a tie to me. [0] Especially compared to this chap: https://en.wikipedia.org/wiki/List_of_things_named_after_Car...
[0] Actually, it's not a tie: If you add the entries on https://en.wikipedia.org/wiki/List_of_conjectures_by_Paul_Er... you get a clear winner.