This book aims to provide empirical evidence regarding the consequences of changes in European societies, focussing on migration and related phenomena of discrimination and xenophobia. The comparative analyses cover all countries of the European Social Survey in the period 2002–2014. They reveal that native members of so-called vulnerable groups, such as the unemployed, retired, permanently sick or disabled and the elderly, were more likely to experience threats and to exhibit anti-immigration attitudes. The contributors further examine social openness defined in terms of marital homogamy, social trust in the context of legitimization and social conditions of sleeplessness. A final methodological section presents the results of a mixed mode experiment involving the face-to-face mode.