Economics
The Logic of Collective Action in Social Movements
Quick fact
Economist Mancur Olson argued that if everyone benefits from a collective good regardless of participation, rational individuals will 'free-ride' on others' efforts, making large-group collective action surprisingly rare unless special incentives exist.
Why this is interesting
You've probably shared a cause you care about—climate change, equality, or a local issue—yet never shown up to a protest or meeting. Why?