According to this http://www.theatlantic.com/national/archive/2010/10/the-gent... it's from 1977

Edit: Interestingly, changing the year in the url still return the same page. So:

http://www.theatlantic.com/magazine/archive/1977/10/the-gent...

http://www.theatlantic.com/magazine/archive/1954/10/the-gent...

Both point to the same article