Globalization has made interactions between individuals from different cultures and languages unavoidable. Therefore, questions concerning bilingualism have become increasingly important within the scholarly community. In this paper, we review this emerging research using a socio-ecological approach. We first present evidence that demonstrates how learning two languages is dependent upon the socio-ecologies of individuals. Second, we review studies that show how bilingualism promotes a myriad of positive social advantages. Then we discuss how the positive effects of bilingualism has affected the socio-ecologies of the individuals. Our discussion sheds light on the challenges that caregivers, educators, scientists, and policy makers face to promote bilingualism in today's globalized world. WC=106/150.