If you had received the warning, would you have listened?
I wonder if I would have.
It's possible that God did warn everyone on earth that the flood was coming, and Noah is the only one who listened, but most likely He told the only one He knew would listen. Interestingly, Methuselah the long-lived man in history has a name that means, "when he dies it shall be sent" God allowed him to live 969 years on the earth - 969 of warning that the flood was coming, with the last 50 to 75 years of those being Noah specifically preaching that it was coming and preparing the Ark.
"We know from the Bible that around 2500 BC (4,500 years ago) the worldwide Flood reduced the world population to eight people. But if we assume that the population doubles every 150 years, we see, again, that starting with only Noah and his family in 2500 BC, 4,500 years is more than enough time for the present population to reach 6.5 billion
(Evolutionary theory maintains) that humans have been around for hundreds of thousands of years. If we did assume that humans have been around for 50,000 years and if we were to use the calculations above, there would have been 332 doublings, and the world’s population would be a staggering figure—a one followed by 100 zeros; that is
10,000,000,000,000,000,000,000,000,000,000,
000,000,000,000,000,000,000,000,000,000,
000,000,000,000,000,000,000,000,000,000,
000,000,000.
This figure is truly unimaginable, for it is billons of times greater than the number of atoms that are in the entire universe! Such a calculation makes nonsense of the claim that humans have been on earth for tens of thousands of years.
Simple, conservative arithmetic reveals clear mathematical logic for a young age of the earth. From two people, created around 6,000 years ago, and then the eight people, preserved on the Ark about 4,500 years ago, the world’s population could have grown to the extent we now see it—over 6.5 billion.
With such a population clearly possible (and probable) in just a few thousand years, we could actually ask the question, “If humans were around millions of years ago, why is the population so small?” This is a question that evolution supporters must answer."