In modern Western societies, social stratification typically is distinguished as three social classes : (i) the upper class, (ii) the middle class, and (iii) the lower class; in turn, each class can be subdivided into strata, e.g. the upper-stratum, the middle-stratum, and the lower stratum.ocial mobility is the movement of individuals, social groups or categories of people between the layers or strata in a stratification system.
Fair trade is a social movement whose stated goal is to help producers in developing countries achieve better trading conditions and to promote sustainability. Members of the movement advocate the payment of higher prices to exporters, as well as higher social and environmental standards.
Free trade is a policy followed by some international markets in which countries' governments do not restrict imports from, or exports to, other countries. Free trade is exemplified by the European Economic Area and the North American Free Trade Agreement, which have established open markets. Most nations are today members of the World Trade Organization (WTO) multilateral trade agreements.