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Four basic personality types identified: Pessimistic; optimistic; envious and trusting

A study on human behavior has revealed that 90% of the population can be classified into four basic personality types: Optimistic, Pessimistic, Trusting and Envious. However, the latter of the four types, Envious, is the most common, with 30% compared to 20% for each of the other groups. This is one of the main conclusions of a study recently published …