The TTAPS study is bullshit (more details on request); if you do thorough 3D atmospheric simulations, as was done later at LLNL, you get at worst a season or two of cooler temperatures, but hardly the end of the world.<p>And I wouldn&#x27;t really characterize the following period as &quot;a bit more serious about arms reduction&quot;, compared to the glory days of détente in the &#x27;70s.  All you really have for that period is the Intermediate-Range Nuclear Forces Treaty, which returned Europe to the situation before the USSR started deploying SS-20s in major quantities (per Wikipedia, eventually 405, each with 3 MIRVed warheads).  After that, it&#x27;s START I, which was signed a few months before the USSR dissolved at the end of 1991.