There are four basic factors that contribute to economic growth: human capital, physical capital, natural resources, and technology. Which factor do you think has had the greatest impact on a country's ability to achieve sustainedeconomic growth?

Now, there is an economist named Solow who is well known for his economic growth theory. Can you kindly look him up and state in 1-2 sentences what he says determines economic growth? He also says that advanced countries eventually reach a "steady state" where the GDP is no longer growing. What does he say causes this?