We found this project via Slate and had to share. Dutch Photographer Ari Versluis and his creative partner Ellie Uyttenbroek have been categorizing different styles of dress for the past 15 years in a photo project they have dubbed Exactitudes (a combination of "exact" and attitudes"). They identify generally unintentional but nonetheless rigid subcultures/identity systems amongst different populations and then photograph the members of said subcultures. The results are both startling and intriguing. Check out the Exactitudes site to see the full breadth of their work.