Empires fell and statues got pulled down. The way your grandma made everyone feel welcome is still being passed around.

Big structures are less durable than they look, and small habits are far more durable than they look. A way of treating people gets copied by whoever was in the room, then copied again by people who never met the original, and it can run for generations with nobody’s name on it. Monuments need maintenance. Habits do not.

Find one practice in your family worth continuing and start doing it yourself: the food, the phone call, the seat kept for whoever turns up. Do it often enough that somebody younger picks it up by watching rather than by being told.