Gen X, consisting of 81 million Americans aged 35-54, is a highly influential generation that is often overlooked by marketers focused on boomers and millennials. Gen X faces new economic realities of being part of the "vanishing middle class" while also dealing with life stage surprises like caring for both children and aging parents. Additionally, their brains and bodies are changing as they reconcile the cognitive effects of middle age and increased health concerns. Despite these challenges, Gen X remains resilient and innovative, continuing to disrupt industries and shape culture through their entrepreneurial spirit.