According to V.V. Volsky, this subgroup unites countries where the development of capitalist relations, their coverage of the territory and population of the country form and consolidate the nation, determine its socio-economic features and class specificity, specialization of its economy and place in the MRI. In other words, only relative maturity, the predominance of capitalist relations can form the type of country. This means that it is in this subgroup that all the main, already formed types of developing countries can be identified. The subgroup covers a wide range of countries, from Latin America, which has the longest capitalist trajectory, to the Arab countries, where the dominance of capitalist relations has been established only in recent decades.