Number of words: 306

On a cold January day, a forty-three-year-old man was sworn in as the chief executive of his country. By his side stood his predecessor, a famous general who, fifteen years earlier, had commanded his nation’s armed forces in a war that resulted in the defeat of Germany. The young leader was raised in the Roman Catholic faith. He spent the next five hours watching parades in his honor and stayed up celebrating until three o’clock in the morning.

You know who I’m describing, right?

It’s January 30, 1933, and I’m describing Adolf Hitler and not, as most people would assume, John F. Kennedy.

The point is, we make assumptions. We make assumptions about the world around us based on sometimes incomplete or false information. In this case, the information I offered was incomplete. Many of you were convinced that I was describing John F. Kennedy until I added one minor little detail: the date.

This is important because our behavior is affected by our assumptions or our perceived truths. We make decisions based on what we think we know. It wasn’t too long ago that the majority of people believed the world was flat. This perceived truth impacted behavior. During this period, there was very little exploration. People feared that if they traveled too far they might fall off the edge of the earth. So for the most part they stayed put. It wasn’t until that minor detail was revealed—the world is round—that behaviors changed on a massive scale. Upon this discovery, societies began to traverse the planet. Trade routes were established; spices were traded. New ideas, like mathematics, were shared between societies which unleashed all kinds of innovations and advancements. The correction of a simple false assumption moved the human race forward.

Excerpted from Pg 11-12 of ‘Start with Why’ by Simon Sinek