SOCIAL DARWINISM; SURVIVAL OF THE FITTEST.
spieces that adapt the best to their environment survive, while ones that don't adapt are eliminated.
(the name of the mod for half-life derived from this term, marines and aliens battling for racial supremacy)
the book "call of the wild" by Jack london defines the term natural selection.
The Urban Dictionary Mug
One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.
Buy the mug