Historical overview
Introduced by Edward Thorndike in 1920 and extended by Howard Gardner's 1983 theory of multiple intelligences. Modern cognitive neuroscience treats it as a distinct, partially dissociable system.
Scientific basis
The 'social brain' network includes the temporoparietal junction (mental state attribution), superior temporal sulcus (biological motion), medial prefrontal cortex (self-other modelling), and mirror neuron system. Damage to these regions can leave general IQ intact while devastating social functioning.
Strengths
- Enables cooperation at scales no other species achieves
- Supports cultural learning and institution-building
- Critical for leadership and persuasion
Limitations
- Computationally expensive and easily overwhelmed in large groups
- Subject to in-group bias and out-group hostility
Relationship to other intelligence systems
Emotional Intelligence
Provides the affective signals that social inference operates on.
Collective Intelligence
Social intelligence is what allows collectives to form at all.
Future implications
Large language models exhibit surprising performance on theory-of-mind benchmarks, raising open questions about whether social intelligence requires lived experience.