Final answer:
Families are the most basic institution of society due to their historical and social significance. They create stability and perform important functions for the prosperity and development of society. Families also provide emotional closeness and support to their members.
Step-by-step explanation:
Families are considered the most basic institution of society due to their historical and social significance. Sociologists view families as a fundamental social unit that creates stability and performs certain functions for the prosperity and development of society. Families also play a vital role in passing on values and traditions from one generation to another. Moreover, they provide emotional closeness and support to their members, which contributes to their importance in people's lives.