This lecture reveals the most powerful methodology available to genealogists. Family historians often begin their genealogical quest by researching only their direct ancestors. For many reasons the direct ancestor they search for may have left few records. The records that survive may not shed light on where the ancestor came from or who his parents were—or any other question about an ancestor. The records that answer questions about an ancestor are sometimes only found by researching his relatives, friends, neighbors, associates, or enemies.