The Coastal Systems period of 1973–1983 catalyzed an integrated view of coastal environments, weaving together physical forcing, sediment dynamics, and biological productivity. Researchers advanced the understanding that alongshore winds drive coastal upwelling and nutrient supply, while tidal and sedimentary processes mold habitat structure and coastal stratigraphy, encouraging cross-disciplinary methodologies including dating techniques and synthesis frameworks that informed restoration and management planning. This period also established links between system-wide physical processes and ecosystem responses, setting the stage for ecosystem-based coastal science and climate-competent coastal management.