Jordan Peterson: The Dangerous I.Q. Debate

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http://youtu.be/9MJUhDQKJcY

This one has some fascinating concepts that were new to me:

The Pareto Principle
The Pareto principle (also known as the 80/20 rule, the law of the vital few, or the principle of factor sparsity)[1][2] states that, for many events, roughly 80% of the effects come from 20% of the causes.[3] Management consultant Joseph M. Juran suggested the principle and named it after Italian economist Vilfredo Pareto, who noted the 80/20 connection while at the University of Lausanne in 1896, as published in his first work, Cours d'économie politique. Essentially, Pareto showed that approximately 80% of the land in Italy was owned by 20% of the population.

It is an axiom of business management that "80% of sales come from 20% of clients".[4] Richard Koch authored the book, The 80/20 Principle, which illustrated some practical applications of the Pareto principle in business management and life.[5] ...

Distribution of world GDP, 1989[10]
Quintile of population    Income
Richest 20%    82.70%
Second 20%    11.75%
Third 20%    2.30%
Fourth 20%    1.85%
Poorest 20%    1.40%...

https://en.wikipedia.org/wiki/Pareto_principle

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The Gini Coefficient, which measures inequities and when measuring economic inequities (not poverty) is very strongly correlated to the amount of violence expressed by young men on the bottom of the measurement.

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The Pareto Principle is also referred to as the Matthew Principle after Matt 25: 29-30

‘For to everyone who has, more will be given, and he will have abundance; but from him who does not have, even what he has will be taken away. 30