The disparity in the level of income has become more uneven or the redistribution of income between developed and developing countries in light of financial and monetary glottalization.
Take trade theory and will get the answer: increased in developed, decreased in developing, but we several exemptions. Inequality increased in the US but only occasionally in Europe. Inequality decreased in SE Asia as the creation of a large middle class indicates.
In any case, one should take specific countries and study changes in income distribution and avoid generalizations.
The measurable differences of social inequality in a given country are always greater than between countries; these metric differences in socio-economic status have risen all over the world, but significantly in China, which is officially a communist country. In any case, progressive economic participation and competition in the capitalist world markets always comes with ecological externalities and social inequalities. It is a matter of domestic political prudence to check these related risks on the level of local human communities, i.e. to develop sensitive feedback loops of social and ecological welfare for the citizens.
You don't required any indices to know that inequality is risen in the world. Economic wise, there is a wide gap between the developed and developing nations, politically, some nations have voices, power and influence more than others in the international arena, culturally, some cultural practices of nations have dominated others. The inequality around the world will continue to rise as far as some many depends on some few economically and politically.
According World Inequality Report the reduction of global inequality, but there is phenomenon as the growth of inequality within the country. As for me, the country where the middle class dominates, theinequality is not high.