The basis of risk analysis* is likelyhood and impact - so the impact (in so many different ways) of a meteorite hitting earth is high, the likelyhood is extremely low; whilst the impact of Climate Change is medium-high, and the likelyhood is medium-high, this equates to a higher risk than a rock from space.
However, if you have concerns about another dinosaur-killer coming along, you may find
this useful.
btw, it's not about living in the dark ages, it's just about making adjustments to mitigate the risk.
*Risk Analysis consists of
(1) Identification of possible negative external and internal conditions, events, or situations
(2) Determination of cause-and-effect (causal) relationships between probable happenings, their magnitude, and likely outcomes
(3) Evaluation of various outcomes under different assumptions, and under different probabilities that each outcome will take place
(4) Application of qualitative and quantitative techniques to reduce uncertainty of the outcomes and associated costs, liabilities, or losses.