What motivated the Industrial Revolution: England's libertarian culture or affluence per se?

What impelled the Industrial Revolution's spectacular economic growth? Life History Theory, Baumard argues, explains how England's world-supreme affluence psychologically fostered innovation; moreover, wherever similar affluence abounds, a "civilizing process" bringing enlightenment and democracy is apt to evolve. Baumard insightfully analyzes a "constellation of affluence" but proffers somewhat whiggish history given England's prior and unique proto-capitalist culture of economic liberty and individualism.