the existence of structured inequalities between groups in society, in terms of their material and symbolic rewards. While societies involve some form stratification, only with the development of state-based systems did wide differences in wealth and power arise. The most distinctive form of straification in modern societies is class divisions.
Caste societies:Societies in which different social levels are closed, so that all individuals must remain at social level of their birth throughout life
Caste: system:A social system in which one's social status is given for life
social economic status
A term introduced by max weber to signify a person's opportunities for acheiving economic status.