This chapter is unlike most others in this volume because it focuses on a developmental period rather than a developing system of the individual. A full understanding of adolescence requires consideration of the rapidly changing individual in ongoing interaction within dynamically changing, multilayered contexts. These contexts include belief systems and scripts associated with personal characteristics of individuals; relationships with parents, siblings, other family members, and friends; activity settings such as schools, religious institutions, and leisure activities; and macrosystems such as history, culture, and political and economic environments. Because of the inherent link between adolescence and social/cultural contexts, this chapter focuses on research that attempts to elucidate such linkages. Even though an increasing number of studies examine differences by race, ethnicity, culture, class, or gender, the focus of such studies is often on the differences per se rather than on the processes that mediate them. Our knowledge of adolescence will advance further when we understand the embeddedness of adolescent development within history, culture, gender, race, and class; therefore, primary attention in this chapter is devoted to the process issues concerning these linkages, especially as they are played out within families. Studies using contextual variables or processes as moderators or mediators of adolescent outcomes are highlighted. This chapter is not intended to be a comprehensive review of the available literature, which would require one or more volumes of its own. Interested readers might wish to consult other reviews on the following topics: broad overviews of adolescence (Adelson, 1980; Feldman & Elliott, 1990; Petersen, 1988, 1993; Takanishi, 1993); contexts (Cooper, 1994; Crockett & Crouter, 1995; Irwin & Vaughan, 1988; Moen, Elder, & Luescher, 1995; Parke & Kellam, 1994; Silbereisen & Todt, 1994; Steinberg & Darling, 1994); families (Collins & Russell, 1991; Gecas & Seff, 1990; Grotevant & Cooper, 1986, in press; Hill, 1987; Noller, 1994; Youniss & Smollar, 1985). (PsycINFO Database Record (c) 2012 APA, all rights reserved)