I can relate to Sagmeister's view of happiness far more than Rawat's. I too spend much of my time designing stuff, and get a great deal of pleasure from that. I think even our concept of happiness changes through time, so the idea of achieving it through repeating the same procedure makes no sense to me. As Susan said, probably pursuit of our own happiness ought to come second to trying to act ethically. Happiness becomes something to indulge in along the way rather than as an end in itself.

I'll get round to Pinker I expect.