[Ben-G]

Definitely more than 1000. Maybe 5ish billion till the sun goes red giant xD

You'e either extremely naive or trolling.

We as a race are long over due for another extinction event.

ikr please tell me u were joking, he asked human civilization not Earth as a whole, I say maybe 5000 more years and Earth will probably be destroyed before the sun kills us

Supposedly the hole in the ozone is shrinking. So perhaps the sun theory may take a while.