Final answer:
The 1928 Southern Regional Conference in Memphis was significant as it was likely a key moment in the evolution of civil rights strategy in the South, providing a venue for activists to unite and plan transformative actions.
Step-by-step explanation:
The 1928 Southern Regional Conference in Memphis was historic because it represented a pivotal moment in the development of civil rights strategies in the American South. Although specific details of this event are not provided in the reference material, we can infer its significance within the wider context of social and political activism in the South during that era. Similar events have served as catalysts for change, creating forums where activists could converge, share experiences, and formulate the tactics that would drive the transformation of societal norms and policies towards greater equality and justice.