Single-planet redundancy isn't a problem until it's a _really big_ (say, inescapable) problem. I'd put good odds on us wiping ourselves out or being wiped out

Single-planet redundancy isn't a problem until it's a _really big_ (say, inescapable) problem. I'd put good odds on us wiping ourselves out or being wiped out before we manage to put a sustainable stake in some other chunk of ground. Also $400B/yr is great if you can make use of it. Do we have the intellectual and facility resources to make use of that sort of windfall today? Probably not. Could more money go to cancer research for immediate positive effect? Probably, although working out the logistics for how best to direct that funding requires resources of its own (which is of course the sort of work the Gates Foundation does).