Why did the historian William Leuchtenburg call FDR's New Deal reforms a halfway revolution?

William Leuchtenburg referred to FDR's New Deal reforms as a "halfway revolution" because, while they significantly transformed the role of the federal government in the economy and provided relief during the Great Depression, they did not fully address systemic issues such as racial inequality and labor rights. The New Deal created a safety net and regulatory frameworks but fell short of enacting more radical changes that could have fundamentally altered social hierarchies. Additionally, some reforms were limited in scope and often compromised to gain political support, reflecting the complexities of American politics at the time.