The text explores the importance of amiability in online environments, contrasting it with the often hostile nature of modern websites and social media. It then uses the Vienna Circle, a group of interdisciplinary thinkers in Depression-era Vienna, as a case study for fostering positive interactions. The Vienna Circle, meeting in cafes and university offices, tackled complex philosophical and mathematical problems with a focus on rigorous reasoning and open discussion. This environment, characterized by intellectual seriousness, empiricism, abstraction, and openness, facilitated productive debate despite differing personalities and viewpoints. The group's amiability was further enhanced by aspects of Viennese cafe culture, including formality, a degree of informality, and the presence of humor. The rise of fascism destroyed this environment with many members fleeing and some suffering deadly consequences. The author concludes by offering eight design principles for creating more amiable digital spaces, drawn from the success of the Vienna Circle, emphasizing the importance of seriousness, empiricism, abstraction, formality, openness, and parody.