Sure, if you consider the "lack of external event" to also be an external event: we have been not been thrown back to the stone age, or pushed to the brink of e

Sure, if you consider the "lack of external event" to also be an external event: we have been not been thrown back to the stone age, or pushed to the brink of extinction, because no big asteroid has impacted the Earth in recent time, and hopefully next time it does we'll be ready to deal with it with modern technology.