37signals believe that the smaller a company is, the more agile it is, which enables it to make crucial changes when necessary. To them, this is simple physics. When any object increases in mass, it requires more force and effort to change its movement or direction. In the same way, a large company can quickly become impossible to control, and doesn’t allow for meaningful changes to be made in the short term. Besides, the more people there are working for a company, the smaller each individual’s split of the profit becomes.