http://www.bbc.com/future/story/20160809-why-it-pays-to-be-grumpy-and-bad-tempered?ocid=fbfut
Citando:
"The truth is, pondering the worst has some clear advantages. Cranks may be superior negotiators, more discerning decision-makersand cut their risk of having a heart attack. Cynics can expect more stable marriages, higher earnings and longer lives – though, of course, they’ll anticipate the opposite.
Good moods on the other hand come with substantial risks – sapping your drive, dimming attention to detail and making you simultaneously gullible and selfish. Positivity is also known to encourage binge drinking, overeating and unsafe sex."
