Evidence is presented on the growing income disparity between countries and on the contribution of international trade in reducing these income differences. Substantial trade liberalization between countries that are the major trade partners of one another is shown to have contributed to a significant reducation in the income gaps that had existed between the countries. The income convergence did not occur prior to the liberalization, nor is convergence a very common feature between countries in general. More generally, it is shown that countries that trade extensively with one another tend to exhibit a much higher incidence of income convergence than countries that do not trade much with each other. And finally, it is shown that the trade-related income convergence was accompanied by faster growth by the liberalizing countries.