Let’s start with the written word.
In Geneva, the US and Russia issued a joint statement in which “we reaffirm the principle that a nuclear war cannot be won and must never be fought.”
Assorted Dr Strangeloves will cringe – but at least the world has it in writing, and may breathe a sigh of relief with this breakthrough of sorts. That doesn’t mean that a “non-agreement-capable” US military-industrial complex will abide by it.
Moscow and Washington also committed to engage in an “integrated bilateral strategic stability dialogue in the near future that will be deliberate and robust.” The devil in the details is in which “near future” the dialogue will progress.