(5/n)
...spacecraft, enabling higher speeds, further reaches, etc.
c) A successful establishment of a #Martian colony by Musk would lead to an immense drain of resources, as the rich would have a "safe room" from climate breakdown.
And there are probably more interdepencies, these are just from the top of my head.
And just to be clear:
this is *no* 1950's enthusiasm for technological advances. Except for #NuclearFusion, I think it would be best if the other two would not happen. //