Shadow History on Instagram: "John F. Kennedy was never meant to be president. That role was destined for his older brother, Joe Kennedy Jr.-the family's golden child, groomed for leadership and power. JFK, by contrast, spent much of his life battling illness. Addison's disease. Chronic back pain. Constant health struggles. He nearly died more than once, and few believed he would ever carry the weight of national leadership. Then World War II changed everything. Joe Jr. was killed in action, and