I imagine car accidents alone would restrict most people to a few hundred years. http://www-fars.nhtsa.dot.gov/Main/index.aspx http://www-fars.nhtsa.dot.gov/Ma

I imagine car accidents alone would restrict most people to a few hundred years. http://www-fars.nhtsa.dot.gov/Main/index.aspx http://www-fars.nhtsa.dot.gov/Main/index.aspx Fatalities per 100 Million Vehicle Miles Traveled: 1.37 At that rate, if one drove 10,000 miles per year of his life, he could expect to live around 7,300 years. Also, accident rates do not exist in a vacuum. They are affected by other risk factors, such as heart-disease and cancer, such that a world with less death from disease could be expected to be less risky in other ways as well. If the number one risk of death in your world were accidents, wouldn't you try to compensate for that by being more cautious?