The period crystallized around a structural-lifecourse synthesis, emphasizing how the distribution and organization of occupations shape social hierarchies and mobility constraints. Researchers integrated quantitative mappings of job categories with micro-sociological insights into worker attitudes, group dynamics, and organizational context, while path-model approaches linked parental status, schooling, and early attainment to adult occupations. Historical Significance: The era established foundational concepts of social closure and professional power, connecting occupational structure to professional authority and knowledge regimes, and setting a policy-relevant agenda for mobility and labor-market inequalities in Occupation Science and related fields.