> Be useful, that's fine, no need to alter the world drastically. More specifically: if you make a minor improvement that affects a lot of people (improve vid

> Be useful, that's fine, no need to alter the world drastically. More specifically: if you make a minor improvement that affects a lot of people (improve video streaming) it is just as good as a major improvement that drastically affects a few people (curing an extremely rare disease). It's the area under the curve that matters. The best would obviously be a large effect over a large number of people, but minor improvements can be very useful.