The most-cited statistic in family-office governance is the seventy-percent number — that seventy percent of family wealth fails to survive into the third generation. The number is methodologically imperfect, but the directional truth holds across our coverage. The decisions that determine which families compound and which fragment are made in the governance transition between generation one and generation two, not in the investment decisions of generation three. The latter just reveals what was already determined.

Three governance choices, in our experience, account for most of the variance.

The first is whether the family separates ownership, governance, and management explicitly and structurally — typically through a Foundation or Trust at the top, a Family Council layer for governance, and a professional management team for execution — or whether the founder-generation patriarch or matriarch retains all three roles and simply hopes the next generation will figure it out. The structural separation is uncomfortable in the short run and decisive in the long run. Families that build it before they need it have a 30-year compounding curve. Families that try to retrofit it after a generational transition trigger usually fragment.

The second is the prenup-and-divorce architecture for in-laws. The decisions about how spouse-class beneficiaries are treated, how divorces are navigated under the family's structure, and how minor children are protected need to be documented in the constitutive documents at family-office formation, not negotiated in the moment of crisis. The families that take this seriously avoid the catastrophic asset-dilution events that destroy the long-tail compound.

The third is the role of the next-generation principals before they inherit. Families that put the next generation through formal apprenticeship roles inside the family office — typically two years on the investment team, two years in operations, two years shadowing governance — produce confident, competent successors who can be trusted with directional authority by their mid-thirties. Families that wait until the formal handover moment usually produce successors who either over-correct (and destroy the founder's strategy) or freeze (and allow advisors to capture decision authority).

None of this is investment advice. It is the structural plumbing that determines whether investment advice matters. Brillwood's family-office work increasingly leads with these questions before any capital question is opened. The families that ask them first compound; the ones that defer them eventually read the seventy-percent statistic in a personal way.