Pope John XXIII
Pacem in Terris §18
Pacem in Terris: On Establishing Universal Peace in Truth, Justice, Charity, and Liberty
18 In the economic sphere, it is evident that a man has the inherent right not only to be given the opportunity to work, but also to be allowed the exercise of personal initiative in the work he does. (14)
Source: Pacem in Terris (Vatican.va)