What are the social causes and consequences of social networks across society and time? My scholarly work connects and contributes to four major specialty areas: social networks, medical sociology and mental health, social stratification (gender, race/ethnicity, and SES/class), and comparative historical sociology. It also extends the literature on marriage and family, education, work and occupations, social psychology, aging and life course, body, media, and environment. I investigate three major research themes: how social networks produce inequalities in health and well-being, how social networks generate social stratification, and how social forces stratify social networks. The network-based concepts I analyze include accessed status (network members’ status), social capital, social cost, social support, social integration, reference group, social comparison, social cohesion, and tie strength. The social stratifiers I study include age, gender, race/ethnicity, SES, and class. The major well-being outcomes I examine include health, mental health, health information search, life satisfaction, lifestyle, body weight, genetic privacy, and environmental concerns. Link to my Curriculum Vitae and Google Scholar.