An increase in people's ability to share views on complicated matters and a decrease in nuance understanding complicated matters.

Everyone has an opinion on the Supreme Court. Few people (I do not include myself in that few) truly understand it's constraints around operation.

Or something as simple as the separation of powers between arms of the establishment (government, judiciary, civil service)

Take a subject like faithless electors, or proposals to disregard the popular vote and appoint electors.