Twoshort, that only works if you can calibrate the amount of help you give to the degree of relatedness.

Otherwise, you're spending energy helping people that could be used for other things. And someone who didn't have this altruism gene will save their energy while benefiting from your altruism. So kin selection works, but the undiscriminating altruism you described doesn't.

Which isn't to say that altruism doesn't exist, just that this kind of explanation for it doesn't work.

Why don't those truckers just pour it out at their next rest stop?
Crazy.

Anyway, the gadget name is misspelled...whatever.