- social Darwinism
- Social decision-making method
- social decision schemes
- social defense school
- social defense theory
- social democracy
- Social Democracy of the Kingdom of Poland and Lithuania
- Social Democratic Front
- Social Democratic Party (Benin)
- Social Democratic Party of Austria
- Social Democratic Party of Denmark
- Social Democratic Party, United States
- social democratic social policy theory
- social desirability
- social desirability bias
- social development
- social development trend analysis
- social deviance
- social dialogue
- social differentiation
- social dilemma
- social disorganization
- social disorganization theory
- social distancing
- social dominance orientation