An Age of Neutrals provides a pioneering history of neutrality in Europe and the wider world between the Congress of Vienna and the outbreak of the First World War. The 'long' nineteenth century (1815-1914) was an era of unprecedented industrialization, imperialism and globalization; one which witnessed Europe's economic and political hegemony across the world. Dr Maartje Abbenhuis explores the ways in which neutrality reinforced these interconnected developments. She argues that a passive conception of neutrality has thus far prevented historians from understanding the high regard with which neutrality, as a tool of diplomacy and statecraft and as a popular ideal with numerous applications, was held. This compelling new history exposes neutrality as a vibrant and essential part of the nineteenth-century international system; a powerful instrument used by great and small powers to solve disputes, stabilize international relations and promote a variety of interests within and outside the continent.