What if you live to be 100? Seven ways to improve aging for everyone.

You likely know that people today, generally speaking, are living longer lives — sometimes much longer lives — than in the past. The average life expectancy in 1930 was 59; now it’s 76, down slightly in the past few years.

But how well are we doing with adapting to those longer lives, including potentially much longer retirements?

Turns out,…