Your Brain Is Ancient. Your Problems Are Unfortunately Very Modern Your Brain Is Ancient. Your Problems Are Unfortunately Very Modern. What Evolutionary Psychology Can Teach Us About Anxiety, Relationships, Overthinking—and Why Your Brain Sometimes Acts Like a Tiny, Overcaffeinated Security Guard Have you ever found yourself lying awake at 2:13 a.m. replaying a conversation from three days ago? Why did she say “Okay” like that? Not okay. But “Okaaay.” Clearly, something has h