"I circled around summer noons and October midnights, sensing that there somewhere in the bright and dark seasons must be something that was really me." - Ray Bradbury
Hypothesis 1: The "golden age" hypothesisThe "golden age" hypothesis says there are one or more "golden ages" from the past that were superior at producing innovation compared to today. Perhaps understanding and restoring what worked about those "golden ages" would lead to an explosion in creativity today.
Is there a way to cultivate curiosity? To start with, you want to avoid situations that suppress it. How much does the work you're currently doing engage your curiosity? If the answer is "not much," maybe you should change something.