There was a time our lives and the world were new and full of wonder, when innocence and curiosity led people to explore, trust each other plainly, make amazing discoveries, invent amazing technologies, or simply make awe inspiring works of art. It ended. There are many plots and stories that evoke this trope to add the bitter in a Bittersweet Ending, or less commonly as something to be fought against in order to preserve the Age or at least the relics thereof. Examples of End of an Age include: