Was the modern period(1750-1914) primarily a period of economic change or continuity ?

The era between 1750 and 1914 C.E. was one of clear European hegemony. In the previous era (1450 to 1750 C.E.),

Explanation: Europeans had tilted the balance of world power away from Asia, where powerful civilizations had existed since ancient times. However, despite growing European influence based on sea trade and colonization, major land-based empires in Asia still influenced long-distance trade and shaped political and economic conditions around them. In this era, Europe not only dominated the western hemisphere, as it had in the last, but it came to control the eastern hemisphere as well. How did they do it? Part of the answer lies in a set of discoveries and happenings that together constitute an important "Marker Event" - the Industrial Revolution. Another set of philosophical and political events were equally important - the establishment of democracy as a major element of a new type of political organization - the "nation."

the conditions that made the byzantine empire vulnerable to attacks by the muslin turks were the sack of constantinople by western crusaders, the conquests of the sultanate of rum, presence of rival kingdoms and finally the set up of fiefdoms at the empire which were owned by the ghazis (turkish warriors).