d. 25% A generally agreed-upon total of deaths due to the Bubonic Plague is thought to be around 25% of the population of Europe and Asia. Some historians, though, believe it to be as high as 40%, which is a staggering thought.
Is estimated to have killed 30 to 60% of Europe's total population.<span>In total, the plague reduced the world population</span><span> from an estimated 450 million down to 350 to 375 million in the 14th century.</span>
The intervention by some civilized nation can be caused by war and famine. Loss of property and other things can be caused through this and can cause intervention by some civilized nation.