Raising Rick's Kids

As anyone with a lick of sense knows, fitness is not merely survival, but production of offspring.  Then of course those offspring also need to survive and reproduce, thus, the phenotype and genotype we are now discussing gains a measure of immortality.  

Ray's favorite TV show is, naturally, The Walking Dead.  In that show, the human population is subject to intense selection pressure.  So far, after five years of getting eaten up by zombies plus increasingly vicious intraspecific competition, we are left with a fairly fit bunch of survivors.  Yet interestingly, the only truly fit individual is Rick.  That's because Rick has produced offspring.  Plus, Rick's surviving associates are raising Rick's kids.