There are relatively few black startup founders, there are also relatively few female startup founders. But both of these have the same underlying cause, both

There are relatively few black startup founders, there are also relatively few female startup founders. But both of these have the same underlying cause, both of these groups are under-represented in the software development profession as a whole. Those minorities who are well represented in the software development profession are those that are well represented in the startup community. Being a successful startup founder means that you're an outlier, and bigger populations have more outliers. It's as simple as that.