Welcome to brain Stuff from how stuff works. Hey, brain Stuff, Laurence Fogelbaum here. Having a legacy is nice, but what of the discovery that bears your name and perpetuity is something that predicts the death of every human on the planet. The thought didn't really seem to bother Benjamin Gomperts much. Gumperts wasn't a fortune teller or the Grim Reaper or anything. He was an actuary, someone who calculates the financial risk
and insurance company assumes by ensuring people. But the mortality equation he formulated in is still our most useful tool for describing how humans and many other animals die out over time, and what the gum Parts law of mortality tells us can be just as chilling today as it was then. Gumparts was born in London in seventeen seventy nine to a successful diamond dealer. Though the family was wealthy enough, they were also Jewish, which excluded Benjamin from
studying at a university at that time. But boy did that kid ever love math, and so he taught himself dogged Lisa, mimitting papers to math publications throughout his early career. While working a day job at the London Stock Exchange, but what he really wanted was to be an actuary, a vocation that would allow him to combine his obsessions with math, statistics and financial theory. Unfortunately, nobody would hire
Gumparts because of his religion. In eighteen twenty four, he quit the stock market following the death of his ten year old son, and he was subsequently hired as an actuary for his brother in law's new insurance company. The next year, he submitted a paper to the Royal Society entitled on the Nature of the function Expressive of the Law of Human Mortality and on a New Mode of Determining the Value of Life Contingencies. In it, he suggested that for most of our adult lives are chances of
dying increase exponentially as we age. It wasn't good news, but it got people's attention. Gumparts pretty much nailed the way to calculate age specific death rates. Of course, he did it to help his insurance company figure out the appropriate rates for buying and selling annuities, but perhaps the death of his only son drove him to a more
comprehensive understanding of the age related trends behind death. Either way, Gumperts gave us an equation stating that after around age thirty, the odds of a person buying the farm roughly doubles every eight years, So assuming you were at least thirty eight years ago, you were half as likely to croak
then as you are today. Nobody has been able to prove this equation wrong for nearly two hundred years, although another British actuary named William Makeum came along about a half a century after Gumperts and added a good bit to the original math that calculates one's risk of death assuming equal risk for everybody of dying from certain specific dangers, no matter what age we are. In case you were wondering, Benjamin Gumperts died at the ripe old age of eighty six.
Oh and his equation works for pretty much all mammals after they reach sexual maturity. The only one that straight up defies it is the naked mole rat. Today's episode was written by Jesselyne Shields and produced by Tyler Playing. For more on this and lots of other topics, including what the heck is up with naked mule raths, visit our home planet how stuff Works dot Com