using people

I've been reading about how we as humans have developed a system so that we don't have to remember everything. For instance, we don't remember everyone's phone number, but we remember where to find them. Couples will develop a shared memory where one person is charged with the tasks of remembering certain arenas of knowledge. That is part of why the process of divorce is so difficult, because each individual is effectively losing half their brain. So I was thinking about the family unit as a team working together to, what, survive? Procreate? Make life as enjoyable as possible? REMEMBER THINGS? This does not bode well for one as unattached as me...