The first Enlightenment emphasized linear, predictable models for change, whether at the atomic or the global level. The second Enlightenment emphasizes the butterfly effect, path dependence, high sensitivity to initial conditions and high volatility thereafter: in short, it gives us chaos, complexity, and non-linearity. What once seemed predictable is now understood to be quite unpredictable.
Liu, Eric; Hanauer, Nick (2011-12-06). The Gardens of Democracy: A New American Story of Citizenship, the Economy, and the Role of Government (Kindle Locations 332-335). Perseus Books Group. Kindle Edition.