2022 https://books.google.com/books?hl=en&lr=&id=lmZjEAAAQBAJ&oi=fnd&pg=PP1&dq=%22global+catastrophic+risk%22&ots=s8CAab3D_y&sig=XqO5RJiTE4H2GgQJmLxJElbHgnQ Book Medium
2022 https://books.google.com/books?hl=en&lr=&id=lmZjEAAAQBAJ&oi=fnd&pg=PP1&dq=%22global+catastrophic+risk%22&ots=s8CAab3D_y&sig=XqO5RJiTE4H2GgQJmLxJElbHgnQ Book Medium