Your social circle might be the key to a long, happy life. That’s according to Simon Sinek, a best-selling author and leadership expert, who says friendship is the “ultimate biohack” for not only ...

In 2009, Simon Sinek stood on a modest stage in front of ... Sinek introduced the world to his theory of "How great leaders inspire action." Later that year, Sinek's 18-minute talk became his ...

The Harvard Study on Adult Development, for one, has been monitoring the well-being and happiness of humans for over 85 years. Marc Schulz and Robert Waldinger, who currently lead the study, confirmed ...

Leadership expert Simon Sinek is the author of Start With Why and Leaders Eat Last. He teaches leaders and organizations how to inspire people and is based in New York.

Simon Sinek is the author of four books, including his latest, "Leaders Eat Last." Sinek sat down with Business Insider to discuss how the Marines embody leadership as a culture. Following is a ...

I am a great fan of Simon Sinek. He is a leadership guru who talks about the what, when, and where, as not the most important. Trying to figure out ...

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Build your expertise around that single, focused area. Think about the thought leaders you know best. Simon Sinek is known for Start With Why. Brené Brown is synonymous with vulnerability.