What was the main cause of the increased productivity in the 1950s?

The main cause of the increased productivity in the 1950s was technological advancement.

In the 1950s and 1960s the productivity of average work was rising  as a result of technological advancement and consequently, American citizens enjoyed a higher standard of living than any other nation. During the 1950s there was a boom time for electric gadgets. Technology allowed to create products on order to help improve lives of consumers in the wake of world war II.

lancelot said to the beautiful ellen i c u r a b u t l n (i see you are a beauty lancelot was the greatest and worst of the knights who became the king's champion and undertook quests in the king's name. he became the adulterous lover of queen guinevere, and they had a son named galahad.

answer:

it caused mass african migration, african populations to grow, african empires to topple, and racism against slaves to emerge.