Reaching a critical mass is a common proximate cause (see Chapter 1) of a tipping point. But the root cause of why a tipping point has been reached is often found in network effects, where the value of a network grows with each addition to it (the effect). Think of a social network—each person who joins makes the service more enticing because there are then more people to reach.
Chapter:
Becoming One with Nature
Section:
Harnessing A Chain Reaction