Social inequality happens when resources in a society are evenly distributed.

Everything from social status, prestige, to the kind of job one holds, or to the chances of living in poverty, is affected by social stratification.

In a class system, the opportunities you have access to depend on the family you happened to be born into.

Manny Pacquiao's social status can be classified as ascribed.

Social stratification is what we are talking about when we talk about social inequality and social mobility.