Hmm... lets take a guess here.People exist like maybe 2million years or 1/4 a million years ago. But how about many people die?There were wars,sickness kill,murder,accidents,people got drown,burned to death,die of hunger,die of cancer but anyway how much deaths on earth? I say like 50millions people.
This question is like asking how much grains of sand are on a beach. Its possible to know, almost impossible to figure out. Just a shot in the dark, perhaps 500mil-1bil...its hard to figure out, and with wars, disease, and other stuff, it makes it almost impossible
Why is everybody say millions, it's billions. There are 6.7 billion people on Earth today, 15,000 people die every day. I'd say it would easily be in the billions, maybe even 15 billion.
From BIO 101 they aid about 60-75 Billion people have existed. I'm not sure how they came up with that number, but I'm no biologist or geneticist, so I'll believe them.
Actually, this is probably a very simple mathematical problem. We should be able to extrapolate a rather accurate number given the knowledge of genetic lines and general number of people alive today.