In purely economic terms, a lot of those 3 billion are a lot better off now than they would have been a century ago. The top of the list, Namibia, has US$5500 or so per-capita purchasing-power parity GDP. If your income is US$5500 per year, you're already pretty far up Maslow's hierarchy.
Of course, just because someone isn't starving to death doesn't imply that they aren't miserable; probably most people reading this comment know somebody in a rich country who has committed suicide.