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.
Definition of free trade. : trade based on the unrestricted international exchange of goods with tariffs used only as a source of revenue.