According to recent research, the animal that kills the largest amount of people is the Theraphosa Blondi. The Theraphosa Blondi is a ten-inch long spider, that attacks whatever it sees that moves. I wouldn't want to run into one of those in a dark alley!
World war II saw more people killed than any other war; estimates on war deaths vary between 62 Million and 78 million. Due to the large numbers of deaths and the amount of destruction it is impossible to know an exact number.
The 30.cal machine gun.
According to wikipedia it was World War 2 with 70 million people killed, most of whom were civilians. http://en.wikipedia.org/wiki/World_War_II
The Spanish Influenza of 1918-1920.
Although it is now eradicated I believe it was smallpox.
Ciudad Juarez, Mexico is dangerous. About 85 people a day are killed.
Most of those killed were gassed to death.
No telling, some countries had multimillion's of deaths. Most by gunfire.
World War II had an incredibly larger number of deaths if including both civilian and military loss of life. In the second World War, over 60 million people were killed, and in the first World War, approximately 37 million people were killed.
Fishing
Deer