How does the past shape the present? Marcia Fine explains how epigenetics has brought a new understanding to how traumas in our collective past profoundly influence and shape who we are today. Focusing on the optimistic possibilities of this new science, Fine asserts that by preserving our traditions, not as a traumatic reaction to the world around us, but as an affirmation of its beauty, we can imprint in our bodies a positive Jewish identity that can reverse the traumas of the past.