👉 Plinyism is a philosophical concept in ancient Roman philosophy that refers to the idea of "being" as an eternal, unchanging quality. It suggests that all things are essentially the same and that there is no distinction between what is real or unreal, good or bad, good or evil, and so on. This concept was developed by Pliny the Elder, a prominent Roman philosopher who lived in the 1st century AD. He believed that everything in existence is fundamentally identical and that this reality