A quick overview for the field of existential risk studies
I've mentioned this on the EA forum before, but Bruce E. Tonn's taxonomy of catastrophes in Anticipation, Sustainability, Futures, and Human Extinction (see https://www.taylorfrancis.com/books/mono/10.4324/9781003000105/anticipation-sustainability-futures-human-extinction-bruce-tonn) seemed particularly well organized, though the systems risk classification scheme from Classifying Global Catastrophic Risks had better coverage than the corresponding Tonn categories.
I've mentioned this on the EA forum before, but Bruce E. Tonn's taxonomy of catastrophes in Anticipation, Sustainability, Futures, and Human Extinction (see https://www.taylorfrancis.com/books/mono/10.4324/9781003000105/anticipation-sustainability-futures-human-extinction-bruce-tonn) seemed particularly well organized, though the systems risk classification scheme from Classifying Global Catastrophic Risks had better coverage than the corresponding Tonn categories.