Questions

What conditions are required for civilization to exist on this planet while the sun provides a suitable environment?

Predicting the future is rather difficult. But we may find information from the assumption that civilization(s) continue for millions of generations. Let us not (here) think about how (or if) we believe this can or should be reached.

If a civilization continues for million of generations...

What does that say about the rate of growth of its population?

How much can its economy grow per generation?

How much of the vital resources can each generation consume?

What threats does it have to survive?