I think Mark Cuban on Shark Tank used to tell founders this. Don't start a company because you have a world-altering idea. Start a company because you love starting companies.
This is how academics and think-tanks and pundits operate.
Of course, what you'll find is that ideas are a dime a dozen and yours likely aren't novel. Execution is the best vehicle does changing the world, and it doesn't matter whose ideas you execute on; what matters is that you like executing.