A la lumiere d'autobiographies d'immigrants &rites dans 1'Amerique du Nord du XXe sihle, l'auteur de cet article dtudie la these tres &pandue selon laquelle les enfants des immigrants sont pris entre leur communautk parentale et leur soci6tk hbte, et, par cons6quent, qu'ils constituent un << groupe p r o b l h e )). Les autobiographies fournissent une image plus complexe que ce que decrit ce modele, indiquant non seulement une existence << ambivalente )), mais Bgalement une vie impregnee de reves d'une nouvelle identitb. S'inspirant des travaux de Deleuze et de Guattari sur la <( litterature mineure )), l'auteur s u m r e que la realiaation de ces r6ves constitue un aspect central du soi-disant <' probleme de la deuxibme generation )>.In light of immigrant autobiographies written in 20th-century North America, this paper examines the widespread thesis that children of immigrants are caught between their parental community and the host society, and therefore constitute a "problem group." Autobiographies provide a more complex picture than what this model portrays, indicating not just an "ambivalent" existence but also a life imbued with dreams of a new identity. Drawing on Deleuze and Guattari's work on "minor literature," the author suggests that the realization of these dreams is a central aspect of the so-called "problem of the second generation."IN AN ARTICLE PUBLISHED AT THE DAWN OF THE 20TH CENTURY, the renowned social statistician Richmond Mayo-Smith (1894) identified three major groups among what he called "the whites" in America. First, there were "the native-born of native parentage,"' the '%rue Americans" who constituted "a homogeneous body, and to this body the others of more recent arrival tend to be assimilated." Then, there were "the whites of for- Although few researchers today, if any, would proceed with such a simplistic scheme, Mayo-Smith's remarks are far from being obsolete. In fact, most social research on children of immigrants' in the 20th century has unfolded in the broader context of the integration of immigrant groups. More specifically, the idea that children of immigrants are caught between the "worlds" or "cultures" of their parents and the host society permeates the sociological literature. As I will try to show below, this idea is articulated in slightly different terms in different periods. Thus, in Thomas Jefferson's time, it was a matter of political loyalty and commitment to "democracy"; at the turn of the 20th century, it became a matter of social integration and order; and in Robert Park's work it turns into a matter of cultural integration. Ultimately, however, we can think of this as a single thesis that has been used in different forms. In this paper I chose to denote this idea as the "twoworlds thesis," partly because the term "world" is fairly broad (and therefore exposes the vagueness of the thesis better), and partly because it is used by Marcus Lee Hansen (1952) in his famous essay on "three generations." This paper is a critical examination of the two-worlds thesis ...