Answer :
People or groups that fail haven't tried hard enough. this claim would likely be made by a human capital theorist.
What is human capital theory?
It corresponds to a theory whose approach focuses on the productive capacity of an economy as directly influenced by the experience, skills and training of workers.
Therefore, according to a theorist of human capital, human failures refer to lack of effort, since if they made more effort in the educational sense, for example, they would increase their economic value. According to critics of the theory, it is too simplistic and does not cover the diversity of aspects that influence economic development.
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