An important contribution still in use was his "Pareto's Law" of income distribution. He argued that in all countries and times, the distribution of income and wealth is highly skewed, with a few holding most of the wealth. He argued that all observed societies follow a regular logarithmic pattern: | An important contribution still in use was his "Pareto's Law" of income distribution. He argued that in all countries and times, the distribution of income and wealth is highly skewed, with a few holding most of the wealth. He argued that all observed societies follow a regular logarithmic pattern: |