For some, “The Lost Generation” immediately conjures visions of writers strolling the late-night, forlorn streets of France. For others, it may very well be ghosts of World War I. In reality, the term is a metaphor for the artists and writers who wallowed in the years between the two Great Wars. The progenitor of this expression, meanwhile, is Gertrude Stein. She was an author and flamboyant artist who was curator of the arts. She was also an important figure during the modernist movement.