The period from the fifteenth century to the end of the eighteenth century witnessed the creation, expansion, contraction, and fall of empires, enhanced and expanded communications, creation and growth – as measured by volume, range and intensity – of trading diasporas, diffusion of major religions far beyond their points of origin, intercontinental and transoceanic dissemination of flora and fauna, major movements – both coerced and voluntary – of population, growing technological sophistication, and advanced in humankind's knowledge of natural, earth, and planetary sciences. It also witnessed religious strife, conquest and war, decimation of populations through disease and hunger, and continued subjugation and oppression of groups of people. Taken by themselves, none of these aspects had been absent before this period and many had manifested themselves, albeit in vastly differing degrees of intensity on a very broad spectrum, on the major landmasses of the world.