Who was responsible for the advent of electricity in America; Thomas Edison or Nikola Tesla? and why

Due to what conditions were slaves brought into brazil to work the fields? the climate was similar to that of africa. the indigenous workers were hired as managers. the indigenous workers had died from exposure to diseases from europe. slaves from africa were already used in other regions and brazil was the next location.

What does engels mean when he writes "everything which here arouses horror and indignation is of recent origin, belongs to the industrial epoch"?

One of the primary reasons martin luther decided to split from the catholic church was because of the sale of indulgences