We asked Gates to choose this year’s list of inventions that will change the world for the better. I was honored when MIT Technology Review invited me to be the first guest curator of its 10 Breakthrough Technologies. Narrowing down the list was difficult. I wanted to choose things that not only will create headlines in 2019 but captured this moment in technological history—which got me thinking about how innovation has evolved over time. My mind went to—of all things—the plow. Plows are an excellent embodiment of the history of innovation. Humans have been using them since 4000 BCE, when Mesopotamian farmers aerated soil with sharpened sticks. We’ve been slowly tinkering with and improving them ever since, and today’s plows are technological marvels. Read Bill Gates's introduction. But what exactly is the purpose of a plow? As well as his introductory essay, read Bill Gates’s conversation with editor in chief Gideon Lichfield . Below are his picks for the 10 Brea