Human uses of mammals that "one is well advised to study the behaviour rather than attempting to get at any underlying emotion". Charles Darwin however had accepted the idea of emotion in animals, writing his 1872 book "The Expression of the Emotions in Man and Animals" on the subject. Darwin believed that mammals had social, mental and moral lives. In "The Descent of Man" (1871), he wrote: "There is no fundamental difference between man and the higher mammals in their mental faculties." Biologists remained wary of the idea, even for the great apes, but this led to serious difficulties, as Donald O. Hebb explained
Emotions in the workplace cognitive function.” “Strong positive emotions of emotionally intelligent people [include] optimism, positive mood, self-efficacy, and emotional resilience to persevere under adverse circumstances. “. “Optimism rests on the premise that failure is not inherent in the individual; it may be attributed to circumstances that may be changed with a refocusing of effort.” Those who express positive emotions in the workplace are better equipped to influence their coworkers favorably. “They are also more likable, and a halo effect may occur when warm or satisfied employees are rated favorably on other desirable attributes.” It is likely that these people will inspire cooperation in