More and more, we are realizing the value of diversity. Not just ethnic, gender, or age diversity-- but diversity of thought and perspective. This is what I believe Malcolm Galdwell means by cognitive diversity.
"We discovered that assembling a successful team depends on choosing the right balance of diversity and cohesion -- achieving the bliss point intersection of the two."
-- Sociologist Brian Uzzi, associate professor of management and organizations at the Kellogg School of Management.