There are generally three levels of people involved in a business: 1) The lowest level are the rank-and-file employees. These are individual contributors and m

There are generally three levels of people involved in a business: 1) The lowest level are the rank-and-file employees. These are individual contributors and middle management. These are the youngest employees given their lack of experience. Because they're the youngest, they've grown up with the most opportunities for traditionally unrepresented groups and thus are the most diverse group. 2) The second level is upper management. These people are older than the low-level employees and are slightly less diverse. 3) The last level, the board level, is largely made up of corporate retirees and are thus the oldest group. Given the lack of opportunity this generation experienced if you weren't part of a specific demographic, it's no surprise the board level is not diverse. The duties of a board member require experience in running a corporation and corporate governance. There just isn't a diverse set of people to draw from due to the average age of qualified people looking to be board members.