I think as an engineer, you'll learn to 'learn how to build'. Then you can learn to build software, or hardware, or anything. Then as a software engineer, you'

I think as an engineer, you'll learn to 'learn how to build'. Then you can learn to build software, or hardware, or anything. Then as a software engineer, you'll earn a decent amount of money. And money is what you will need to sponsor your dreams of changing the world. And getting started in software isn't too hard, you just need a computer and internet. Worst case, you can always fail and start again (minus health). So out of any career, I think a Software Engineer one is a pretty good bet. You will at least get a pretty good set of tools to help you out. Then it's up to you and your determination. All that said, I don't think there's a single 'career' that will make you change the world. Nothing and nobody will make you change the world, it will come from you.