When did social security come into being?

Social security is government-led non-profit social insurance, including endowment insurance, medical insurance, unemployment insurance, work injury insurance and maternity insurance. The advantage of paying social security is that it may solve your own social security problems. For example, endowment insurance solves the problem of providing for the aged after retirement, while medical insurance solves the problem of not being able to afford medicine for medical treatment. Compared with commercial insurance, social security is guaranteed by government financial credit.

Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.