Serious question. Do you mean like a physical barrier? Similar to absconding to New Zealand when SHTF and it’s TEOTWAWKI? In a very real sense, Mars is the ulti

Serious question. Do you mean like a physical barrier? Similar to absconding to New Zealand when SHTF and it’s TEOTWAWKI? In a very real sense, Mars is the ultimate gated community. See also https://www.bloomberg.com/features/2018-rich-new-zealand-doomsday-preppers/ https://www.bloomberg.com/features/2018-rich-new-zealand-doo...