  We study the joint evolution of worldviews by proposing a model of opinion
dynamics, which is inspired in notions from evolutionary ecology. Agents update
their opinion on a specific issue based on their propensity to change --
asserted by the social neighbours -- weighted by their mutual similarity on
other issues. Agents are, therefore, more influenced by neighbours with similar
worldviews (set of opinions on various issues), resulting in a complex
co-evolution of each opinion. Simulations show that the worldview evolution
exhibits events of intermittent polarization when the social network is
scale-free. This, in turn, trigger extreme crashes and surges in the popularity
of various opinions. Using the proposed model, we highlight the role of network
structure, bounded rationality of agents, and the role of key influential
agents in causing polarization and intermittent reformation of worldviews on
scale-free networks.
