Castro's poor judgement led directly to the Cuban Missile Crisis. Afterwards John F Kennedy estimated there was between a one-third and one-half chance that it would have escalated to nuclear war [1]. That seems like an underestimate considering that we now know some of the missiles were fully operational [2]
Yet today it's difficult for most people to appreciate the extreme threat and terror of nuclear weapons in the 1960's. Half of US voters think life was better then than now [3]. Really? To me, there's no level of job security that could possibly compensate for such a high chance of nuclear catastrophe.
[1] Reported in https://www.amazon.com/dp/B00RKO6MS8/ref=dp-kindle-redirect?...
[2] As described by Robert McNamara in 'The Fog of War'
[3] http://www.pewresearch.org/fact-tank/2016/10/20/6-charts-tha...