This book analyzes whether the "new debate on genetics" owes a debt to eugenic practices by welfare democracies of 1930s and 1940s. More specifically, the question is whether precisely the same "eugenic rationale" used in the 1930s is philosophical akin to a new rationality unfolding in some Western European welfare societies that find themselves trapped in the modern dilemma of choosing between increasing immigration and population growth that leads to economic prosperity on the one hand, or halting immigration, protecting national identity, and suffering economic stagnation on the other....