Ask HN: What should I be doing to Maximize the Benefit Mankind can get from me?

All my life I was productive thinking I need to maximize my productivity because I want to maximize the benefit I can provide to mankind. I got into science because I thought that is how I personally could contribute most. Recently I am having a sort late 20s crisis. Are the chips I am helping design to improve efficiency of consumer electronics helping mankind at all? Probably not as much as I could be doing. I am wondering what I could be doing in terms of a different job or a side project to help mankind the most (or at least help me rationalize what I am doing is actually helping mankind somehow).