A number of leading contemporary historians, including historian Fernand Braudel (d. 1985) and British historian Hugh Trevor-Roper (d. 2003), assert that the existing consensus among scholars is that Protestant Work Ethic theory is false. They refer to the pre-Reformation existence of rapid economic development of Catholic capitalist communities.
Protestants, beginning with Martin Luther, reconceptualized worldly work as a duty which benefits both the individual and society as a whole. Thus, the Catholic idea of good works was transformed into an obligation to consistently work diligently as a sign of grace. Whereas Catholicism teaches that good works are required of Catholics as a necessary manifestation of the faith they received, and that faith apart from works is dead (James 2:14–26) and barren, the Calvinist theologians taught that only those who were predestined to be saved would be saved.
Since it was impossible to know who was predestined, the notion developed that it might be possible to discern that a person was elect (predestined) by observing their way of life. Hard work and frugality were thought to be two important consequences of being one of the elect. Protestants were thus attracted to these qualities and supposed to strive for reaching them.