If families resemble trees, as they say, arborescent structures with entangled roots and individual branches jutting out at awkward angles, family traumas are like thick, translucent resin dripping from a cut in the bark. They trickle down generations. They ooze down slowly, a flow so slight as to be imperceptible, moving across time and space, until they find a crack in which to settle and coagulate. The path of an inherited trauma is random; you never know who might get it, but someone will.