How did Positive Psychology select just twenty-four strengths out of the enormous number of traits to choose from? The last time anyone bothered to count, in 1936, more than eighteen thousand words in English referred to traits. Choosing which traits to investigate is a serious question for a distinguished group of psychologists and psychiatrists who are creating a system that is intended to be the opposite of the DSM (the Diagnostic and Statistical Manual of Mental Disorders of the American Psychiatric Association, which serves as a classification scheme of mental illness). Valor, kindness, originality? Surely. But what about intelligence, perfect pitch, or punctuality? Three criteria for strengths are as follows:
They are valued in almost every culture They are valued in their own right, not just as a means to other ends They are malleable
So intelligence and perfect pitch are out, because they are not very learnable. Punctuality is learnable, but, like perfect pitch, it is generally a means to another end (like efficiency) and is not valued in almost every culture.
While psychology may have neglected virtue, religion and philosophy most assuredly have not, and there is astonishing convergence across the millennia and across cultures about virtue and strength. Confucius, Aristotle, Aquinas, the Bushido samurai code, the Bhagavad-Gita, and other venerable traditions disagree on the details, but all of these codes include six core virtues:
Wisdom and knowledge Courage Love and humanity Justice Temperance Spirituality and transcendence
Each core virtue can be subdivided for the purpose of classification and measurement. Wisdom, for example, can be broken down into the strengths of curiosity, love of learning, judgment, originality, social intelligence, and perspective. Love includes kindness, generosity, nurturance, and the capacity to be loved as well as to love. Convergence across thousands of years and among unrelated philosophical traditions is remarkable and Positive Psychology takes this cross-cultural agreement as its guide.
These strengths and virtues serve us in times of ill fortune as well as better moments. In fact, hard times are uniquely suited to the display of many strengths. Until recently I thought that Positive Psychology was a creature of good times: When nations are at war, impoverished, and in social turmoil, I assumed, their most natural concerns are with defense and damage, and the science they find most congenial is about healing broken things. In contrast, when nations are at peace, in surplus, and not in social turmoil, then they become concerned with building the best things in life. Florence under Lorenzo de Medici decided to devote its surplus not to becoming the most awesome military power in Europe, but to creating beauty.