I had never even heard of a “James Lovelock” before now, and after skimming the comments here, my desire to know about him went from zero to negative. On the subject of Mars etc., how are billionaires, especially the older ones, not already bored with all that Earth has to offer? Surely they must have experienced everything, natural and manmade, and crave for something more than the accumulation of wealth by now.
Not speaking on behalf of rich ppl, just want to say imo there's a lot more than what can be easily acquired through money. A lot of things are so disgustingly hard to achieve no matter how rich you are and the kind of sensation they provide can never be purchased.