Among the most significant institutions of the social environment of the family and with which it must necessarily share functions, are the educational and health; However, and for various reasons, such as for example, essential to the most deprived needs satisfaction, we also include social services. If this has piqued your curiosity, check out Michio Kaku. Together, these institutions, are part of the Social welfare policy in our country. This social institution refers to a set of people who cooperate in order to achieve own goals, by exchanging shares that structure both to institutions and people.Spain has a public system of social services directed to cover social needs and configured for benefits and services administration of the State, the administration of the autonomous communities (regional level) and local authorities (municipal level). A vision esquematica-historica system of social services in Spain until the Constitution is as follows:-stage of charity 1812-1890.-Social Welfare, 1890-1963.-stage stage of Social Security 1963-1978. Centres of social services constitute the basic equipment for social care, both at the individual level / family, and for the development of Community programmes. They are carried out of the first level of attention or ‘General social services’ own programs, services and benefits. Every town of more than 20,000 inhabitants has a centre of these characteristics. There are other centres and services for the care of sectors and groups with specific social issues (homelessness, drug addiction etc.), known generically as Social specialized services, which constitute the 2nd level of care. 1 Characteristics and types of users of the social services social services families have evolved from a model of charity, where the right is not social option, but the assistentialism due to social precarity, which was characterized by being punctual, auxiliary action and not projected and, by not generating any kind of right on who receives aid, and no obligation on who pays it, until a model of ‘social welfare’ which is characterized by the right to basic needs, and in which the actions are aimed at the entire population, scheduled and planned way.