The scientific method is a method of procedure that has characterized natural science since the 17th century, consisting in systematic observation, measurement, and experiment, and the formulation, testing, and modification of hypotheses.
Like Bacon, the French philosopher René Descartes believed that a new science would lead to knowledge and inventions that would promote human welfare. Unlike Bacon, Descartes was a gifted mathematician, honored as the inventor of analytic geometry, and the advocate of a deductive, mathematical approach to the sciences.
Florence was the site of many economic developments. It was witness to new systems of taxation and borrowing during the Middle Ages and the Renaissance. Trade was a major source of economic success. Moreover, industry was strong due to the implementation of craft guilds. Florence was not dominated by royal courts, like other states. Instead, it was a republic with an elected government. This made the city more frugal in taste, which also meant that the behaviour of people in terms of wealth accumulation and saving was more moderate and humble, contributing to the thriving economy.
<span>Foremost, the Mongols produced a charismatic leader, Genghiz Khan, who united the Mongol tribes in a dream of conquest and expansion.</span>
