No way to know, but the concept of "momento mori" https://en.wikipedia.org/wiki/Memento_mori https://en.wikipedia.org/wiki/Memento_mori means the living might

No way to know, but the concept of "momento mori" https://en.wikipedia.org/wiki/Memento_mori https://en.wikipedia.org/wiki/Memento_mori means the living might live more "examined" - and therefore more valuable or meaningful lives - when they are conscious of the inevitability of their own death. Perhaps this consciousness then benefits the society/group they are a member of?