Reply #2: I think social progression is a myth

[salvorhardin]

There's no reason to think that societies progress along a continuous curve. In fact, I'd say it's pretty unlikely.

Now, if you mean social change, I don't think longer lifespans has to necessarily equate to social stagnation. Longer lifespans could result in increased social change as we have more time to invent and refine technologies, and participate in more than one career. We'd also have more time for play which could result in more liberal attitudes on a variety of social issues.