Why do you think think historian considers the renaissance the beginning of the modern history?

Historians today consider the period preceding the Renaissance to be the Middle Ages, which effectively began with the fall of Rome in the fifth century and lasted for some eight or nine centuries. ... Following the Renaissance, the world started changing in several significant ways

in 1803 the louisiana purchase took place, doubling the size of the country. by 1840 almost 7 million americans had migrated westward in hopes of securing land and being prosperous. the belief that settlers were destined to expand to the west is often referred to as manifest destiny.

explanation:

the enslaved people onboard suffered from illness with some frequency