> I find it astonishing that you couldn't think of examples of businesses that have had a bigger impact on humanity than Twitter and Facebook. I never said I c

> I find it astonishing that you couldn't think of examples of businesses that have had a bigger impact on humanity than Twitter and Facebook. I never said I couldn't think of businesses with more (current) impact than Twitter and Facebook! I think my work history amply illustrates that (Google[x], Google Life Sciences, etc). I was simply saying: A lot of really great, impactful businesses started off with more-modest beginnings; chiding existing upstarts for not being sufficiently ambitious borders on hubris.