ABSTRACT
Expectable catastrophes can be divided into three types according to severity, with in-betweens: Contained catastrophes, with many killed and much material damage, but main civilizations surviving, such as an epidemic killing, say, up to 20 percent of humanity; or a super-volcano eruption destroying the western United States. Major catastrophes, with global civilization shuttered but humanity surviving, such as a local nuclear war resulting in some years of nuclear winter. Terminal catastrophes, with most of life including all of humanity killed. The top imperative is to prevent such human-caused terminal catastrophes, and this is the primary aim of evolution steering as guided by humanity-craft. The possibility of major catastrophes, say a virus killing most of humanity, requires preparing for such a contingency in ways avoiding panic. Sheltering critical tools and manuals at many locations can speed up recovery.
