The period united studies of nearshore processes around a central idea: coastlines behave as dynamic, three-dimensional systems whose behavior arises from the interaction of waves, currents, and sediment transport. Researchers linked measurable longshore sand flux to littoral drift, advanced groin-based interpretations, and demonstrated that alongshore and cross-shore dynamics interact to shape beaches and bars. Methodologies increasingly integrated field measurements, theory, and morphodynamic reasoning to produce predictive frameworks for shoreline evolution and coastal management.