When she was growing up, Mia Monroe remembers, monarch butterflies were a natural part of the rhythm of life. This was in the 1960s, and Mia and her family lived in San Carlos, California, at that time a bedroom community of redwood bungalows and postwar cottages located south of San Francisco. She was a “nature kid,” and from a very early age, she recalls, monarchs shaped her emotional landscape. She gathered the milkweed that grew in clumps al…