Our Knowledge of High-Mass Star Formation at the Dawn of Herschel
  We review the theories and observations of high-mass star formation emphasizing the differences with those of low-mass star formation. We hereafter describe the progress expected to be achieved with Herschel, thanks notably to Key Programmes dedicated to the earliest phases of high-mass star formation. 
Fr\'ed\'erique Motte (AIME), Patrick Hennebelle (LRA)