I would imagine it's a pretty short timespan, relatively speaking. Technology can progress exponentially in a way that biology does not. Once a society gets to the point where they can create existential risks faster than they can manage them, in an accelerating fashion, things are likely to collapse in pretty short order.
Our own society has created a number of serious risks for ourselves that our evolved minds aren't great at mitigating in just the last century. Now think about how tech is accelerating and what might be developed in the next 1000 years. We're either going to figure out a new structure for managing existential risks or die trying.
Our own society has created a number of serious risks for ourselves that our evolved minds aren't great at mitigating in just the last century. Now think about how tech is accelerating and what might be developed in the next 1000 years. We're either going to figure out a new structure for managing existential risks or die trying.