They see family as a positive thing for society. The say that a nuclear family is the most beneficial to society- the look at the look at the functions it provides for society, they say it provides:
Reproduction- has means to keep the human race going
Primary Socialisation- the family teaches the norms, values needed in society.
Economic and Emotional Support- the family gives financial support and emotional wellbeing.
Sexual stabilisation - ensures that adults sexual relationships are controlled and stable