text:  An event like that has the power to punctuate our genes with these chemical marks that can signal to the body whether a gene should be red or not. It's that influential. And that explains how it's possible for descendants of trauma victims, so people like Leah, who never saw camp, to nonetheless be affected by trauma, too, because it affects them genetically. But the thing I want to say that's really hopeful here is the opposite is true, Elsa. Changing our environment for the better has the power to put the brakes on cycles of trauma.