stratified based on authority and power, economically stratified based on income level and wealth, occupational stratification about one's occupation. Some roles for examples doctors, engineers, lawyers are highly ranked, and thus they give orders while the rest receive the orders. There are three systems of social stratification which are the caste system, estates system, and class system. Castes system usually ascribed to children during birth whereby one receives the same stratification as of that of their parents. The stratification may be superior or inferior and thus influences the occupation and the social roles assigned to a person. Estate system is a state or society where people in this state were required to work on their land to receive some services like military protection. Communities ranked according to the nobility of their lords. The class system is about income inequality and socio-political status. People can move the classes when they increase their level of income or if they have authority. People are expected to maximize their innate abilities and possessions. Social stratification characteristics include its universal, social, ancient, it's in diverse forms and also consequential. The quantitative variables most often used as an indicator of social inequality are income and wealth. In a given society, the distribution of individual or household accumulation of wealth tells us more about variation in well-being than does income, alone. Gross Domestic Product (GDP), especially per capita GDP, is sometimes used to describe economic inequality at the international or global level. A better measure at that level, however, is the Gini coefficient, a measure of statistical dispersion used to represent the distribution of a specific quantity, such as income or wealth, at a global level, among a nation's residents, or even within a metropolitan area. Other widely used measures of economic inequality are the percentage of people living with under US$1.25 or $2 a day and the share of national income held by the wealthiest 10% of the population, sometimes called "the Palma" measure. Patterns of inequality in the economic world There are a number of socially defined characteristics of individuals that contribute to social status and, therefore, equality or inequality within a society. When researchers use quantitative variables such as income or wealth to measure inequality, on an examination of the data, patterns are found that indicate these other social variables contribute to income or wealth as intervening variables. Significant inequalities in income and wealth