What aspect of architecture does Le Corbusier primarily focus on in his designs?

Le Corbusier primarily focuses on functionalism in his architectural designs. This principle emphasizes that the design of a building should be driven by its intended use and the needs of its occupants. Le Corbusier believed that architecture should serve practical purposes, prioritizing efficiency, comfort, and utility while creating spaces that meet the requirements of modern life. His approach advocated for open floor plans, the use of new materials like concrete and steel, and innovative construction techniques that reflected the needs of a rapidly industrializing society.

The focus on functionalism sets Le Corbusier apart from other architectural philosophies that might highlight emotional impact, which emphasizes the feelings evoked by a space, or historical relevance, where designs might draw heavily from past styles and precedents. Environmental sustainability, while increasingly important in contemporary architecture, was not a primary focus in Le Corbusier's work, as the industrial context of his time had different considerations regarding building materials and environmental impact. Thus, functionalism is the cornerstone of Le Corbusier's architectural philosophy, illustrating how form ultimately follows function.