2023 https://books.google.com/books?hl=en&lr=&id=I0fSEAAAQBAJ&oi=fnd&pg=PT200&dq=%22catastrophic+threat%22%7C%22existential+risk%22%7C%22existential+threat%22%7C%22end+of+civilization%22%7C%22end+of+civilisation%22%7C%22collapse+of+civilization%22%7C%22collapse+of+civilisation%22%7C%22survival+of+civilization%22%7C%22survival+of+civilisation%22&ots=tpUmcx-tz8&sig=vlTHl-17KY9FqHInTNo8qui6-AA