Final answer:
The concept of pioneering new forms in architectural design, even at the risk of being controversial or unpopular, is characteristic of Stylistic cultural Avant-gardes. These movements historically push the boundaries and break away from traditional conventions, often using technology as a source of inspiration and embracing radical new ways of thinking.
Step-by-step explanation:
Belief that new forms must be pioneered, even if they're shocking or unpopular, aligns with the principles of Stylistic cultural Avant-gardes. These encompass radical artistic movements that reject established conventions and push the boundaries of what is considered acceptable in art and architecture. The avant-garde often pioneers technological innovation as a source of inspiration, looks beyond traditional European customs, and embraces new ways of thinking, which can indeed provoke controversy or lack popularity initially.
Throughout history, such as during the Modernist period, there was a conscious effort to break away from the past and create something new, which was epitomized by Ezra Pound's injunction to 'Make it new!'. Modernists like Le Corbusier and movements such as Art Nouveau are examples of pushing the envelope in architecture by integrating traditional styles with new technologies. Conversely, movements like Conservative Architectural Movements, Preservationist Approaches, and Classic Revival Movements tend to revere and preserve the past rather than seek to disrupt it with new forms.