The 80-20 rule was named after Italian economist Vilfredo Pareto who, in 1906, noted that 80% of Italy’s income was collected by 20% of Italy’s population. The 80-20 ratio also held true for the distribution of Italy’s property. Pareto found that 20% of the population owned 80% of the country’s land.
That 80% of the consequences stem from 20% of the causes may be demonstrated in almost every people group… families, companies, government, churches, and countries.
