Construction is plain, simple - in order to define an architectural sense of space.
Through this extremely formal development of space, the human condition could be bettered. Corbussier - Villa Savoye, 1928. Literally raise the human spirit as you move from the garage, work spaces on the first floor to the living spaces on the second floor. Lack of ornamentation, etc. They were looking primarily at the machine - espouse the goodness of mass production, ease of construction, simple technological means, etc.