An interesting vignettes from the National Film Board that seems quite simple at first, but then think about what the short is talking about, an interesting concept.

The introduction in fact makes it more interesting:

In this animated short from the Canada Vignette series, learn how societies in evolution are often in danger of self-destruction.

Canada Vignettes: The Egg , Jean-François Pouliot & Robert Bélisle, provided by the National Film Board of Canada

Speaking of societies in Evolution how about this

Canada Vignettes: News Canada, Yossi Abolafia, provided by the National Film Board of Canada