Over the period from 1988 to 2005, the income share of the top five percent has grown by about 3.5 percent of global household income, and the shares of all the other groups have diminished. The greatest relative reduction was in the bottom quarter, which lost about one third of its share of global household income, declining from 1.155 to 0.775 percent, and now is even more marginalized.

Given the total income and wealth available in the world today, we could easily overcome poverty, which would require raising the share of the bottom half from three to roughly five percent. Unfortunately, the trend is going in the opposite direction.

The bottom half of humanity is living in severe poverty; not all of them are malnourished or severely deprived now, but they are extremely vulnerable to even small upsets in their income or in the prices they face of basic necessities, and when something like this happens, they can be thrown off kilter in terms of a disease of a family member or a change in food prices; anything like that can throw them into destitution.

I think one big improvement would be if we somehow made it cheaper and easier for developing countries to learn from the sad experience of some of the developed countries, and also from some of the positive experiences we have of building good transportation systems, like high-speed rail.

To improve global health, it's not enough just to have a really good new product and to obtain marketing approval. You still need to market the product and bring it to patients, follow up, create the infrastructure, and so on - the whole pipeline, the network. That's something that companies are extremely good at: organizing a whole pipeline in a cost-effective way.

The Bank and the media continue to propagate the story that the global elite wishes to be told: that the number of poor has declined by 24 percent in those 15 years [1990-2005].

Domestic power structures are shaped in good part by global arrangements.