Paul Graham is a programmer, writer, and investor. In 1995, he and Robert Morris started Viaweb, the first software as a service company. Viaweb was acquired by Yahoo in 1998, where it became Yahoo Store. In 2001 Grahams started publishing essays on website paulgraham.com, which in 2014 got 12 million page views. In 2005 he and Jessica Livingston, Robert Morris, and Trevor Blackwell started Y Combinator, the first of a new type of startup incubator. Since 2005 Y Combinator has funded over 800 startups, including Dropbox, Airbnb, Stripe, and Reddit. Some of Paul’s best essays are: “How to Make Wealth”, “How to Start a Startup”, “Hiring is Obsolete”, “The Hardest Lesson for Startups to Learn”, “The 18 Mistakes that Kill Startups”, and “Why To Not Not Start a Startup”.