The economic theory that developed in the 17th century was mercantilism. <span />
Answer:
By 1913, the British Empire held sway over a population of about 458 million people, approximately one-quarter of the world'spopulation. It covered about 36.6 million km² (14.2 million square miles), about a quarter of Earth's total land area.
He determined that the laws of physics are the same for all non-accelerating observers, and that the speed of light in a vacuum was independent of the motion of all observers.