Incidentally, I think even though (as Piketty claims) inequality may be increasing, the average person (certainly in developed nations, but also in developing ones) has also been unimaginably enriched over the past 200 years. By any ethically relevant standard (access to food, shelter, heating, technology, entertainment), we live unbelievably fortunate lives. This when our ancestors a mere 3-4 generations ago were unspeakably poor.