"The founder effect is like the British Empire, the British have spread their culture throughout most of the world through establishing multiple colonies"
The rest of the discussion in slide 9 of the linked slide show.
METAMIA is a free database of analogy and metaphor. Anyone can contribute or search. The subject matter can be anything. Science is popular, but poetry is encouraged. The goal is to integrate our fluid muses with the stark literalism of a relational database. Metamia is like a girdle for your muses, a cognitive girdle.