1969 is a big year due to man landing on the moon. Cars becoming ubiquitous (they certainly were a luxury item well into the sixties here). 1970s gave us the integrated circuit and arguably the start of modern computing. 1980s the collapse of the Soviet Union, genetic research. 1990s: well, I can go on :P

Agree. For the drama of it, I'd move the end-date up to 1969, just to catch the moon landing.

My great-grandfather learned to care for horses, and drive a wagon / buggy, and keenly remembered the first time he saw an automobile. He qualified as a doctor before antibiotics were invented, and then lived long enough to at least exist in a house with a personal computer - whether he ever used it is something I never thought to ask my grandfather!