How many existentialists does it take to change a lightbulb?

Two. One to change the lightbulb and one to observe how the lightbulb symbolizes an incandescent beacon of subjectivity in a netherworld of Cosmic Nothingness.

*a_blackpanther linked to the interactive version of this chart in the comments below.

!!!BONUS!!!BONUS!!!BONUS!!! (Because the world is a depressing place of murder and hatred...)