In the 20th century, the composition of labor in the United States moved from manual work to intellectual work. Consequently, there has been a significant increase in the pace at which diversification of intellectual occupations has taken place, particularly when compare with that of manual occupations. Manual skills result in the creation of material goods and transformation of existing goods. On the other hand, intellectual skills do not have a direct material effect.
There has been a noticeable shift in the labor market from manual skills to intellectual skills. Our parents and grandparents mainly relied on manual skills in order to earn ...