The Renaissance marked a turning point in Europe’s relationship to Arabic thought. On the one hand, Dag Nikolaus Hasse argues, it was the period in which important Arabic traditions reached the peak of their influence in Europe. On the other hand, it is the time when the West began to forget, and even actively suppress, its debt to Arabic culture. Success and Suppression traces the complex story of Arabic influence on Renaissance thought.

It is often assumed that the Renaissance had little interest in Arabic sciences and philosophy, because humanist polemics from the period attacked Arabic learning and championed Greek civilization. Yet Hasse shows that Renaissance denials of Arabic influence emerged not because scholars of the time rejected that intellectual tradition altogether but because a small group of anti-Arab hard-liners strove to suppress its powerful and persuasive influence. The period witnessed a boom in new translations and multivolume editions of Arabic authors, and European philosophers and scientists incorporated—and often celebrated—Arabic thought in their work, especially in medicine, philosophy, and astrology. But the famous Arabic authorities were a prominent obstacle to the Renaissance project of renewing European academic culture through Greece and Rome, and radical reformers accused Arabic science of linguistic corruption, plagiarism, or irreligion. Hasse shows how a mixture of ideological and scientific motives led to the decline of some Arabic traditions in important areas of European culture, while others continued to flourish.

It is common to define Europe by its democratic, scientific, religious, and cultural traditions. But in What is European?, Dag Nikolaus Hasse argues that the search for Europe's essence has taken a troubling turn. He shows that many traditional ideas about Europe are culturally one-sided and historically and geographically distorted, and calls for a decolonisation and deromanticisation of the discourse on Europe.

The book promotes an inclusive vision of Europe that reflects its long history of multiethnic cities, offers a cultural home to a wider range of people across the continent, and extends attention and respect to other continents, thus laying a more respectful foundation for shaping the future together.

At the same time, Hasse demonstrates that overcoming colonial ways of thinking does not and should not result in anti-Europeanism. Criticising European arrogance may well go hand in hand with feeling culturally at home in other traditions of Europe. For this, it does not matter whether one is a resident of the European continent or not. There is no privileged access to European culture or to the culture of any other continent.