Pessimism

Pessimism is a mental attitude in which an undesirable outcome is anticipated from a given situation. Pessimists tend to focus on the negatives of life in general. A common question asked to test for pessimism is "Is the glass half empty or half full?"; in this situation, a pessimist is said to see the glass as half empty, or in extreme cases completely empty, while an optimist is said to see the glass as half full. Throughout history, the pessimistic disposition has had effects on all major areas of thinking.

The term pessimism derives from the Latin word pessimus, meaning 'the worst'. It was first used by Jesuit critics of Voltaire's 1759 novel Candide, ou l'Optimisme. Voltaire was satirizing the philosophy of Leibniz who maintained that this was the 'best (optimum) of all possible worlds'. In their attacks on Voltaire, the Jesuits of the Revue de Trévoux accused him of pessimisme.

In the ancient world, psychological pessimism was associated with melancholy, and was believed to be caused by an excess of black bile in the body. The study of pessimism has parallels with the study of depression. Psychologists trace pessimistic attitudes to emotional pain or even biology. Aaron Beck argues that depression is due to unrealistic negative views about the world. Beck starts treatment by engaging in conversation with clients about their unhelpful thoughts. Pessimists, however, are often able to provide arguments that suggest that their understanding of reality is justified; as in Depressive realism or (pessimistic realism). Deflection is a common method used by those who are depressed. They let people assume they are revealing everything which proves to be an effective way of hiding. The pessimism item on the Beck Depression Inventory has been judged useful in predicting suicides. The Beck Hopelessness Scale has also been described as a measurement of pessimism.

Wender and Klein point out that pessimism can be useful in some circumstances: "If one is subject to a series of defeats, it pays to adopt a conservative game plan of sitting back and waiting and letting others take the risks. Such waiting would be fostered by a pessimistic outlook. Similarly if one is raking in the chips of life, it pays to adopt an expansive risk-taking approach, and thus maximize access to scarce resources."

The leading causes of pessimism are genetics, past experience, and social and environmental factors. One study of 5,187 teenage twins and their siblings suggests that genetics may account for one-third of the variance in whether someone leans toward pessimism vs. optimism, with the remaining variance due to their environment, and twin studies suggest that, when it comes to personality, about half the differences between us are because of genetic factors. But Spector points out that throughout our lives, in response to environmental factors, our genes are constantly being dialled up and down as with a dimmer switch, a process known as epigenetics.

Through history, some have concluded that a pessimistic attitude, although justified, must be avoided to endure. Optimistic attitudes are favored and of emotional consideration. Al-Ghazali and William James rejected their pessimism after suffering psychological, or even psychosomatic illness. Criticisms of this sort however assume that pessimism leads inevitably to a mood of darkness and utter depression. Many philosophers would disagree, claiming that the term "pessimism" is being abused. The link between pessimism and nihilism is present, but the former does not necessarily lead to the latter, as philosophers such as Albert Camus believed. Happiness is not inextricably linked to optimism, nor is pessimism inextricably linked to unhappiness. One could easily imagine an unhappy optimist, and a happy pessimist. Accusations of pessimism may be used to silence legitimate criticism.

Nouriel Roubini, an economist who introduces himself as Dr. Doom, was largely dismissed as a pessimist in 2006 for his dire but to some extent accurate predictions of a financial crisis, ahead of the 2008 financial crisis. However, financial journalist Justin Fox observed in the Harvard Business Review in 2010 that the crisis Roubini predicted was not at all like the 2008 financial crisis; it involved a currency crisis and run on the dollar and dismissed Roubini's predictions as inaccurate. Others noted that "The problem is that even though he was spectacularly right on this one, he went on to predict time and time again, as the markets and the economy recovered in the years following the collapse, that there would be a follow-up crisis and that more extreme crashes were inevitable. His calls, after his initial pronouncement, were consistently wrong. Indeed, if you had listened to him, and many investors did, you would have missed the longest bull market run in US market history." Another observed: "For a prophet, he's wrong an awful lot of the time." Tony Robbins wrote: "Roubini warned of a recession in 2004 (wrongly), 2005 (wrongly), 2006 (wrongly), and 2007 (wrongly)" ... and he "predicted (wrongly) that there'd be a 'significant' stock market correction in 2013." Speaking about Roubini, economist Anirvan Banerji told The New York Times: "Even a stopped clock is right twice a day." Economist Nariman Behravesh said: "Nouriel Roubini has been singing the doom-and-gloom story for 10 years. Eventually something was going to be right."

Personality Plus opines that pessimistic temperaments (e.g., melancholy and phlegmatic) can be useful inasmuch as pessimists' focus on the negative helps them spot problems that people with more optimistic temperaments (e.g., choleric and sanguine) miss.^{[citation needed]}