This is our first sponsored post! If you are a free subscriber, you’ll see an ad for our sponsor, 80,000 Hours, later in the article. If you a paid subscriber you will continue to enjoy an ad-free experience. Ads like this will allow us to produce more and better stories for all of our readers.To protect our editorial integrity, our advertisements follow five principles — click here to read them. If you’d like to sponsor one of our articles in the future, you can click here to learn about our au...