This is a repository of useful terms not available (or satisfactory so) on Wikipedia.
Allogamy
Dunbar's Number
Existential Risk
A City is a self sustaining node of humans.
TinyCity
Emotion
BlockChain
Social Networking
Medium
Microgrid
Metropolis
Metabolism
Node
Superlative
Propagation
U.N. 2.0
Modules
Glossary