I would take half and create a trust fund specifically for providing education scholarships to family members, startup/venture capital for family members who want to start businesses, and create a family corporation that will decide what to do with the money generated by the trust that isn't tied up directly in the primary missions of providing relatives with options, education, and mortgage assistance.
The other half would be managed independently by myself with the primary mission of growing it through investments, passive and active. A small slice would be sliced off to buy a home, pay off my father's mortgage on our family home, and set up a trust fund using $10 million to generate a guaranteed income for myself.
But that is neither here or now because I don't have $100 million.
What you said.
Preserve for future family.
Conservation.
Growth
in other words...what I do already....just a heck of a lot more