The reign of the first two Tudor kings brought several radical changes in English history. The end of the 15th century and the first half of the 16th century was the period of transition between the Middle Ages and modern times, which had an impact not only on the history of England but on the whole European political and governmental system in general. It is the time of three great dynasties competing with each other for European hegemony. Although this era rather belongs to the early modern period, the chief means of seizing territories – which was a measure of power - were great wars and pre-determined marriages between families. Diplomacy was rarely trusted by the kings partly because the communication system was not developed and partly because the European power structure was so unsteady that it could not be calculable. Consequently, treaties were rather short-lived and neither of the sovereigns took them for granted. The mover of the great actions was the kings’ general desire for hegemony and for wealth. In other words, it was a struggle for the survival of the fittest. (Introduction)