It is easy to underestimate how much the world can change within a lifetime, and so it is worth taking seriously what those who work on AI expect for the future. Most AI experts believe there is a real chance that human-level artificial intelligence will be developed within the next decades, and some believe that it will exist much sooner. How exactly such powerful AI systems are built and used will be very important for the future of our world, and our own lives. All technologies have both positive and negative consequences, but with AI the range of these consequences is extraordinarily large: the technology has an immense potential for good, but also comes with large downsides and high risks.