This is also fun for kids to understand the subject.
Fill a glass with water right up to the edge.
Then put paperclips in it - it is surprising, how many fit in while the surface of water is arching more and more.
That goes up to a certain point, where a critical mass has been reached.
Then only one more paperclip - and the water runs out.
In similar mode it needs a critical mass to make changes in societies. Then it needs only one little breath of a human, and the system is rapidly changing without any return.
Exactly this is happening now, while we are waiting each day...
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