I've heard it before and so have you. We need more women in tech. We need more minority engineers. Everyone from Jesse Jackson and even President Obama has made a call for more inclusive policies in tech companies. But it still hasn't happened. You need only look at the recent numbers released by Google, Facebook and Apple to see that white men still top the charts when it comes to their employee count. It all seems hopeless. Leslie Miley, who was the only black engineer in a leadership position at Twitter up until a couple of weeks ago, must have felt so too. In a blog post on Medium, he explained that he left the company because he felt defeated in his efforts in trying to increase and encourage company diversity. The problem: Culture.