Leaders, the study showed, have overall lower stress levels than those who work for them.

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Those only doing as they are told, always forced to follow the rules, are the ones who suffer the most.

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Even when we know that feeling insecure at work hurts our performance and our health, sometimes even killing us, we stay in jobs we hate. For some reason, we are able to convince ourselves that unknown dangers outside are more perilous than the dangers inside. And so we adapt and put up with uncomfortable work environments that do not make us feel good or inspire our best work.

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Children are better off having a parent who works into the night in a job they love than a parent who works shorter hours but comes home unhappy.

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Unfortunately, there are too many leaders of companies who believe, in the face of external challenges, that the best way to motivate their people is by creating a sense of internal urgency or pressure. Based on our biology and anthropology, however, nothing could be further from the truth.

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important are conferences, company picnics and the time we spend around the watercooler. The more familiar we are with each other, the stronger our bonds. Social interaction is also important for the leaders of an organization. Roaming the halls of the office and engaging with people beyond meetings really matters.

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Some believe we should always put others first—that if we don’t look out for the group, the group won’t look out for us. Others believe we should always put ourselves first and that if we don’t take care of ourselves first, then we would be of no use to anyone else. The fact is, both are true.

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The first two chemicals, endorphins and dopamine, work to get us where we need to go as individuals—to persevere, find food, build shelters, invent tools, drive forward and get things done. I like to call these the “selfish” chemicals.

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The other two, serotonin and oxytocin, are there to incentivize us to work together and develop feelings of trust and loyalty. I like to call these the “selfless” chemicals. They work to help strengthen our social bonds so that we are more likely to work together and to cooperate, so that we can ultimately survive and ensure our progeny will live on beyond us.

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Stephen Colbert, political satirist and host of The Colbert Report, commented during an interview on the importance of laughter in tense times. “You can’t laugh and be afraid at the same time,”

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DOPAMINE IS THE reason for the good feeling we get when we find something we’re looking for or do something that needs to get done. It is responsible for the feeling of satisfaction after we’ve finished an important task, completed a project, reached a goal or even reached one of the markers on our way to a bigger goal. We all know how good it feels to cross something off our to-do list. That feeling of progress or accomplishment is primarily because of dopamine.

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ENDORPHINS SERVE ONE purpose and one purpose only: to mask physical pain. That’s it. Think of endorphins as our own personal opiate. Often released in response to stress or fear, they mask physical pain with pleasure.

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It is dopamine that makes us a goal-oriented species with a bias for progress.

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As we get closer to our goals, the metrics tell us we’re making progress and we get another little hit to keep us going. Then finally, when we reach our goal, that intense feeling of “got it” is a big hit of dopamine, our biological reward for all that hard work.

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Obviously the bigger the goal, the more effort it requires, the more dopamine we get. This is why it feels really good to work hard to accomplish something difficult, while doing something quick and easy may only give us a little hit if anything at all.

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Cocaine, nicotine, alcohol and gambling all release dopamine.

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There is another thing to add to that list of things that can hijack our dopamine reward system: social media.

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Serotonin is the feeling of pride. It is the feeling we get when we perceive that others like or respect us. It makes us feel strong and confident, like we can take on anything. And more than confidence boosting, it raises our status.

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Those who work hardest to help others succeed will be seen by the group as the leader or the “alpha” of the group. And being the alpha—the strong, supportive one of the group, the one willing to sacrifice time and energy so that others may gain—is a prerequisite for leadership.

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