2023 https://books.google.com/books?hl=en&lr=&id=TqDEEAAAQBAJ&oi=fnd&pg=PT273&dq=%22survival+of+humanity%22%7C%22survival+of+man%22%7C%22global+collapse%22%7C%22society+collapse%22%7C%22historical+collapse%22%7C%22catastrophic+collapse%22%7C%22global+disaster%22%7C%22catastrophic+harm%22%7C%22future+generations%22%7C%22longtermism%22%7C%22megarisk%22&ots=zC8fZ3O4Ek&sig=VQpWjYapzj0wtJ0zu1o6YAqo4PY