At least in the USA, the various world crises in the 1960s were quite a bit worse for the prospects of your new born children. We just had the Cuban Missile Crisis where we got closer to global thermal nuclear war than ever in history. The war was raging in Vietnam where young men were dying. The Soviet Union was flexing its power in Eastern Europe where they had just rolled tanks into Czechoslovakia. China had detonated their first Hydrogen bomb.

Frankly it looked pretty bleak then where there was a chance you and your entire family would die in nuclear hellfire potentially any day.