Prevention is possible only by elimination of known risk factors and this is a difficult and long term goal, e.g. change of diet and lifestyle habits.
Early detection is currently the most promising method to fight breast cancer. The main advantages are:
(a) Improved survival
(b) Less mutilating surgery
(c) Less toxic drug therapy
This method is easier to implement and yield results faster than prevention.
Better treatment is an expensive method to fight breast cancer as it involves development of tertiary medical services. New drugs and surgical technique usually take time and effort to develop.