[rdmcfee]

Does it not seem possible that many of the factors leading to this gender grouping are influenced by biological age? For example, research shows that our brains are hugely influenceable until our mid to late 20's. At that point major pathways have been established which influence our thinking for the rest of our lives.

What if we counter aging such that people never leave their peak physical condition? (25 years old?)

Will they still group by the generation in which they were born?

[walterbell]

In the movie, In Time, the 25-year old non-aging humans receive a starting "bank balance" of credits shown on their smartwatch. When their credits drop to zero, they die. Life for most people consists of working or stealing to top-up. They mostly group by geographical free-trade zones sorted by bank balances of "time credits", separated by borders and armed checkpoints.

http://www.rottentomatoes.com/m/in_time/reviews/