cleanliness ( handwashing)
penicillin
Probably penicillin was the #1 development that changed how we fight bacterial infections.
He changed their world. Brought disease, slavery, and discrimination.
Because of people moving in and out, disease, death, births, etc.
The industrial revolution
Well known historical people are venerable through selflessness in the ways they have changed America for the better.
The people of India have changed their environment by working actively on safe water supplies and proper waste disposal. This is having a major impact on disease in this country.
The true historical context of the rifle in the United States begins around the time of the Civil War. It changed the distance people could shoot one another and wild game. This put more distance between people in war and in hunting. It fundamentally changed both.
The car. The car changed the way people lived.
They acquired it by becoming infected but surviving the infection.
'Historical' points are points earned before a major site update changed the way contributions were counted. The site describes them as "miscellaneous points from our older system".
it changed where people lived and convinced more people to make viliges and stay in one place
Early humans were nomadic because they were constantly in need of food and water. This changed with the development of agriculture.