1. intellectual lineage
2. stable over a long period
3. politicians must take opposing positions (enough numbers on each side)
4. transmission from elites to masses. 3/11
US/ UK edition @OUPPolitics - bit.ly/2DSDqpu (discount code - ASFLYQ6) or in stores, Amazon etc
South Asia Edition in stores & Amazon India - amzn.to/2DFmEJm