Final answer:
Le Corbusier was the architect who championed the color white and modernist architecture, contributing significantly to the development of the International Style, which focused on functionality and the absence of ornamentation.
Step-by-step explanation:
The architect who promoted the color white and modernist architecture as a way to build a new world was Le Corbusier. As Europe was recovering from WWI, Le Corbusier developed a style that was highly influential in steering society toward a new, utopian future. He published influential texts on modern architecture, presenting his vision for a new way of building that aligned with the emerging International Style, which emphasized volume, industrial materials, and the absence of decoration and color.
Modernist Architecture and Le Corbusier
Le Corbusier displayed his modernist ideals through various texts such as L'Esprit Nouveau and Vers une architecture, outlining principles like free façade and open floor plan. He posited that "A house is a machine for living in," signaling a departure from traditional ornate architecture. This philosophy was in line with the sentiments of the 1920s and 30s, as modernist architects and designers sought to utilize new technologies and materials like steel and glass to create clean lines and practical spaces.