... But reason and emotion are both required for action I think. Just as reason informs us that the hurrican victims need help we will probably do little without the emotion of caring.
You aren't particularly familiar with sanctimonious do-gooders are you? Those lovely folk who talk a good game about how we must all help all the suffering people and then walk right by the bleeding homeless person or the frail elderly person who has fallen and is unable to get up again on their own. Do-gooders are a fun lot of fakes...as long as the camera is rolling or the reporter is trailing along they do nice things all over the place. As soon as they are not being watched, boy howdy, they won't even lift a finger to help anyone.
So what it boils down to is emotion is only a part of it, and for some it is almost not a part at all. Technically it (emotion) is a part for the do-gooders since they are doing it in order to look good in the eyes of others, thus making themselves feel their self-righteous best.