Economics
The Logic of Collective Action in Interest Group Formation
Quick fact
Mancur Olson's 1965 book, The Logic of Collective Action, showed that large groups like consumers or taxpayers often remain unorganized, while small groups like industries dominate politics.
Why this is interesting
If a group of people all benefit from a common goal, wouldn't it be logical for them to work together to achieve it? Surprisingly, the larger the group, the less likely it is to organize.