Answer: the Protestant ethic
Explanation:
In "The Protestant Ethic and the Spirit of Capitalism," Weber (1864-1920) studies the religious ideas of the Protestant ethic as a contributing factor to the emergence of the capitalistic spirit.
Particularly one branch of Protestantism, Calvinism, is presented by the sociologist as holding beliefs, such as predestination and the idea that economical gain is a sign of God's favor, that contradicted the traditional economic system, and paved the way for the emergence of modern capitalism, in which profit is considered as an end in itself, and pursuing profit is seen as a virtuous activity.