I think I can add two items to the discussion. 1. People have been automating away other people's jobs for millennia. Even though this has been happening, pove

I think I can add two items to the discussion. 1. People have been automating away other people's jobs for millennia. Even though this has been happening, poverty is at an all time low. 2. It's not your responsibility to make a herculean difference. I can see that the fewer people (the knowledge of this that you're exposed to) there are that try to make a difference the larger your contribution needs to be to even out all the slackers. At least that's how we feel. If we all (those who care) felt this way we'd all get stuck and not do anything. The correct reaction (and only plausible) is to "do your part" as if you were one in 7 billion. The reason why the richest of the rich (think Gates) have campaigns that are public is because they know, even with their wealth, that they cannot make a very large difference with a lot of people changing their habits be that giving or lifestyle.