A big face picture composed of all human nude people

This face, if you look closely it is composed of all naked people. Apparently, the program broadcast by the Australian broadcasting station "SBS"Who Do You Think You Are?It seems to be a propaganda poster.

The enlarged image is from the following.
SBS Who Do You Think You Are ?: Face | Ads of the World: Creative Advertising Archive & Community

Eye part


Nose and mouth parts


Apparently in terms of image, many people existed in the past before the present self was born, it seems that they represent the family itself connected to all those people.