The best inheritance may be wisdom that prevents repeating expensive mistakes.

Most of what people hope to leave behind is material, but the more valuable transfer is knowledge about what not to do. The business mistake, the marriage that failed for a reason worth naming, the decade lost to a habit, all of it cost someone a great deal and can be handed over for the price of an honest conversation. That is the rarest thing in families, because it requires admitting things.

Tell someone younger about a mistake you actually made, in detail, without dressing it up as a lesson learned gracefully. The specifics are what transfers. Sanitized versions teach nothing.