Complex sentence: Comparative advantage paved the way for the promotion of globalization via increased international trade, which is the guiding theme in the policies promoted by the OECD and the World Trade Organization, where it is assumed that international trade automatically leads to increased economic prosperity.
Split into simpler sentences: Comparative advantage paved the way for the promotion of globalization via increased international trade, which is the guiding theme in the policies promoted by the OECD and the World Trade Organization. In this world view it is assumed that international trade automatically leads to increased economic prosperity.