The welfare state is structured as a family resemblance concept, not a necessary-condition one.

Evidence

We typically think of the welfare state as providing certain kinds of goods and services, such as unemployment insurance, health care, retirement income, etc. Underlying this notion of the welfare state is a family resemblance structure. The secondary-level dimensions are the various kinds of goods and services provided by the state. — Gary Goertz, Social Science Concepts, 258

Categorization

• DEFINE: Introduces the family resemblance concept structure and identifies secondary-level dimensions as the services a state provides.
• XREF: Ties to this chapter’s earlier treatment of secondary-level dimensions and family resemblance structures.