For the concept "rational behavior" to exist, there needs to be some agreed upon concept of purpose first. You need to have a goal to act rationally towards.
Every single goal that is considered worth pursuing is in line with our basic instincts, however.
We want the best for our selfs, for our gene-pool and especially for our children. We may cut back on self-interest here and there, but only to help our fellow humans.
Even the stuff that looks like true altruism is sold to us as a benefit to our gene-pool. "Save [insert endangered species x here] so that our grand-children may enjoy seeing them too".
If every goal for rational behavior is set by our instincts then there isn't much point trying to make a fundamental distinction between the 2, is there?
Every single goal that is considered worth pursuing is in line with our basic instincts, however.
We want the best for our selfs, for our gene-pool and especially for our children. We may cut back on self-interest here and there, but only to help our fellow humans.
Even the stuff that looks like true altruism is sold to us as a benefit to our gene-pool. "Save [insert endangered species x here] so that our grand-children may enjoy seeing them too".
If every goal for rational behavior is set by our instincts then there isn't much point trying to make a fundamental distinction between the 2, is there?