@CTLAWYER
Thank you (& too bad)
Yes, specifics tailored to local law are important and widely variable (changing in time, too) but some general criteria exist, such as reinvesting assets in the family, sharing complementary skills among siblings, choosing wisely a spouse, and staying as much as possible away from war (not that it always works out). I am sure you have a lot more to share. Unfortunately our ancestor did not have enough time with us.