How this income, wealth, is distributed through political-economic system from high income to low income houses. Also looking at things like health chances. Having the skills and education and experience, technology, to continually develop. As we are developing as social systems, and economic societies, we are not destroying the foundations i. e. the earth. Democratic reform, in eyes of american policy makers, is political development. Development is about progress, making our societies, lives, politics better than they were before a sense of growth over time. How economics grow, why the grow, and why in the aggregate they grow over time, and as individuals our experiences and conditions improve over time. They predict i. e. which economies will grow over long term, and ones that won"t. Under a system of perfectly free commerce, each country naturally devotes its capital and labour to such employments as are most beneficial to each.