“…Philosopher Lisa Heldke ( 2018 ), reflecting on the indispensable role gut microorganisms play in human functioning, asks: what happens to our mental models of the world “if we take seriously the degree to which all life on this planet, including human life, is threaded through with relationships in which one creature sinks its ‘teeth’ into another and hangs on for dear life, deriving vital sustenance from that second creature, but sometimes imperiling the life of it as well?” (p. 247). We cannot continue to live without our gut microbiota, and thus, “at the (literal) bodily center of us,” Heldke writes, “we find not some solid, essential core, but the rest of the world ” (p. 248, emphasis in the original).…”