Things like space-flight can be solved by relatively small teams without having to convince billions of people from different cultures to change what they are d

Things like space-flight can be solved by relatively small teams without having to convince billions of people from different cultures to change what they are doing. In terms of global development, things have improved greatly over the last 50 years, say. So it depends what kind of person you are. Do you like sitting in committees? Do you like, or can you tolerate a great deal of convincing other people to do things? How many cycles of that have you been through? How many otherwise good projects have you seen fail due to (human) factors entirely outside of the participants' control. Although it may seem that way sometimes, hard engineering problems aren't really an adversarial game. Hard human problems typically are.