This text takes a look at at the macroeconomics of developing countries based on the influence of global markets on domestic savings, private investment, firm behaviours, employment levels and income distribution. It suggests that a Keynesian approach is still relevant today when reformulated to reflect open economics, heterogenenous firms, poverty reduction objectives and volatile financial markets. The study concludes with clear recommedations as to how global capital markets might be reconstructed in order to better support economic development.