It’s dangerous to be alive and risks are everywhere. But not all risks are created equally. Luckily, the Ragnarök Question Series will bring essential clarity to your evaluation of the risks facing humanity. Its aim is to analyse some of the catastrophes we are most likely to befall, and to identify potential causes of our collective demise.
Predictions about global catastrophes this century
This table contains all probabilities of the computed on the 10h of February, 2021. The table was generated from 1,820 predictions. The first two columns are computed as the product of the overall probability of a catastrophe and the probability that if a catastrophe occurs it is due to the relevant event. The third and fourth columns are products of the earlier columns and the probability that if the relevant catastrophe occurs more than 95% of the population will be lost. The precise specification of each question may be found in the question list below. ">10% decline?" and ">95% decline?" refer to the percentage loss in the Earth's human population relative to the precatastrophe population over some specified timeframe. The total is computed using the assumption that events are independent.
All individuals questions can be found here:

By 2100 will the human population decrease by at least 10% during any period of 5 years?

Will such a catastrophe be due to either humanmade climate change or geoengineering?

Will such a catastrophe be due to a nanotechnology failuremode?

Will such a catastrophe be due to an artificial intelligence failuremode?

Will such a catastrophe be due to biotechnology or bioengineered organisms?
For those with an interest in the fate of humanity in the event of some the above catastrophes occur, have a look at following questions.