Most people in Manhattan legal circles knew William D. Zabel as the guy billionaires called when their marriages fell apart. He was the ultimate gatekeeper of high-society wealth, co-founding Schulte Roth & Zabel and quietly slicing up fortunes for the ultra-wealthy. But reducing his 89-year life to a series of lucrative boardroom splits misses the point entirely.
Zabel died at 89, leaving behind a dual legacy that seems almost impossible to reconcile. How does the same man who represented George Soros and Jane Welch in high-stakes family law battles also author the fundamental civil rights brief that dismantled America's anti-miscegenation laws? He did both, and he didn't see a contradiction.
The Mississippi Mud and the Loving Brief
Long before he was handling trusts for the elite, Zabel was a young Harvard Law graduate looking for trouble in all the right places. In the summer of 1964, he went down to Mississippi. He wasn't there to network. He was there to get Black citizens registered to vote. He was threatened, harassed, and literally shot at by the Ku Klux Klan. That wasn't an academic exercise; it was raw, dangerous frontline work.
He took that fire back north. By 1965, he published a definitive piece in The Atlantic titled "Interracial Marriage and the Law." He laid out a legal roadmap that exposed the rank unconstitutionality of state bans on mixed marriages.
When the landmark case Loving v. Virginia made it to the Supreme Court, Zabel didn't sit on the sidelines. He wrote the primary amicus curiae brief for the ACLU. When the court ruled unanimously in 1967 that marriage bans based on race were illegal, it wasn't just a win for Richard and Mildred Loving. It was a massive validation of Zabel's precise legal architecture.
Billion-Dollar Splits and High-Wire Wealth
In 1969, Zabel co-founded Schulte Roth & Zabel alongside a handful of other young, hungry attorneys. Over the decades, the firm grew into a powerhouse, eventually merging with McDermott Will & Emery in 2025.
Zabel became the undisputed king of trusts, estates, and matrimonial law for the 1%. He didn't just move money around; he understood the psychology of the super-rich. Forbes Advisor named him one of New York's best divorce lawyers as recently as 2024. He knew how to protect assets, but more importantly, he knew how to manage egos.
Critics might argue that shielding the assets of hedge fund managers is a far cry from defending civil rights workers in the South. But Zabel used his immense commercial success to fund a lifelong obsession with global human rights.
He spent over two decades chairing Human Rights First. He didn't just sign checks from a New York office. He went on dangerous fact-finding missions to:
- The Soviet Union to track political dissidents.
- The Philippines during times of intense political upheaval.
- Chile under Augusto Pinochet, where he personally intervened to secure safe haven in the U.S. for Judge Carlos Cerda, the lonely magistrate tracking regime atrocities.
What Corporate Lawyers Get Wrong About Public Service
Many modern attorneys look at pro bono work as a box to check for the annual firm marketing brochure. Zabel's career proves that theory wrong. He proved you don't have to choose between building a massive, profitable practice and dedicating yourself to systemic justice.
He didn't compartmentalize his life. He leveraged the leverage. The same sharp, analytical mind that negotiated dizzying corporate divorces allowed him to spot the vulnerabilities in autocratic regimes abroad. He used his elite network to build a massive infrastructure of law firms that took on asylum cases for refugees.
If you are looking for a lesson in Zabel's passing, it's pretty straightforward. Stop waiting for the "perfect time" to do meaningful work. Zabel didn't wait until he was retired or comfortable to risk his life in Mississippi or draft the Loving brief. He did it when he was young, broke, and had everything to lose.
The real test of a legal legacy isn't how many billable hours you accumulate or how much money you shield from the tax man. It's whether you left the framework of human rights stronger than you found it. By that metric, Zabel outpaced almost everyone else in the room.
To see Zabel reflect on his journey and his time building a powerhouse New York practice, check out this archival interview detailing the history of Schulte Roth & Zabel on BuildingNY. It offers a window into the mind of a man who masterfully balanced high-finance legal operations with a gritty, lifelong commitment to social justice.
