By Gary Katz
Professional Genealogist & Genetic Genealogy Researcher
Most genealogy advice quietly encourages expansion. Add more ancestors. Accept more hints. Grow the tree.
The problem? Size hides structural weakness.
A tree with hundreds or thousands of names can feel productive while becoming increasingly unstable. Contradictions multiply. Sources thin out. Assumptions harden into facts simply because they’ve been repeated often enough.
What breaks trees isn’t missing information — it’s unexamined information.
A strong genealogy foundation isn’t about how far back you go. It’s about whether every relationship you’ve recorded can withstand pressure. Pressure from new records. Pressure from DNA. Pressure from conflicting stories.
When the foundation is weak, every new name you add compounds the problem. When it’s strong, even a small tree can support deep, confident research.
This is why serious genealogy begins by stabilizing what you already have. Before expanding outward, the structure has to be trustworthy.
If your research feels increasingly tangled instead of clearer, that’s often a sign the foundation needs attention. I explore how to stabilize and strengthen an existing tree in Building the Tree Foundation: Turning Family Stories into a Solid Research Base .
About the Author
Gary Katz is a professional genealogist and DNA detective specializing in Jewish and Eastern European research, genetic genealogy, and lineage reconstruction.
If you’d like to follow along, I occasionally share research insights, case studies, and workflow notes in my Roots Roundup email list.
If you’re facing a complex research question and want help clarifying what the evidence actually supports, the best place to begin is with a focused assessment.