Evolution is still happening. It's not weeding out what you call the weak and the stupid, but that's not its job - it only selects those who are best adapted to their environment, whatever that may be.
Some people are still having 8 kids, some are having 2, and some are having none. This is not randomly distributed across genotypes, so some are being selected.
Some people are still having 8 kids, some are having 2, and some are having none. This is not randomly distributed across genotypes, so some are being selected.