A few centuries ago, when Galileo (1564-1642) was trying to make a couple of points about how our world really works, one of the arguments that frequently came up in response to his ‘the earth orbits the sun’ theory was “if the earth is moving through space, how come I don’t notice?”
Not that I have much to begin with, but I don’t feel the wind constantly in my hair, I don’t get orbit-induced motion sickness, so why, Galileo, don’t I notice this movement as the earth is spinning around over 100,000 km per hour?
His answer is known as Galilean Relativity and it contains principles that have broad application in life.
Understanding Galilean Relativity allows you to consider your perspective in relation to results. Are you really achieving what you think you are?
First, an explanation of the theory.
Imagine you are on a ship that has reached constant velocity (meaning without a change in speed or direction). You are below decks and there are no portholes. You drop a ball from your raised hand to the floor. To you, it looks as if the ball is dropping straight down, thereby confirming gravity is at work. You are able to perceive this vertical shift as the ball changed its location by about three feet.
Now imagine you are a fish (with special x-ray vision) and you are watching this ship go past. You see the scientist inside, dropping a ball. You register the vertical change in the position of the ball. But you are also able to see a horizontal change. As the ball was pulled down by gravity it also shifted its position east by about 20 feet. The ship moved through the water and therefore so did the ball. The scientist on board, with no external point of reference, was not able to perceive this horizontal shift.
This analogy helped Galileo explain why we don’t notice the earth moving — because we’re at the same constant velocity, moving with our planet.
It can also show us the limits of our perception. And how we must be open to other perspectives if we truly want to understand the results of our actions. Despite feeling that we’ve got all the information, if we’re on the ship, the fish in the ocean has more he can share.
History offers an illuminating example of this principle at work.
In the early fourteenth century, two English kings (Edwards I and II) were repeatedly in conflict with Scotland over Scottish independence.
Nationalism wasn’t as prevalent as an identity characteristic as it is today. Lands came and went with war, marriage, and papal edicts, and the royal echelons of Europe spent a lot of time trying to acquire and hold on to land, as that is where their money ultimately came from.
There were a lot of factors that led Edward I, King of England, to decide that Scotland should be his. It has to do with how William the…