Understanding Your Money: Capital vs Consumption — The Wealth of Nations

Smith explains how personal wealth splits once you have more than a few weeks of savings. Poor workers spend almost everything they earn. A man with stock in reserve divides it into capital, which is meant to earn future income, and goods for daily use like food, clothes, and housing.

Capital comes in two forms. Circulating capital buys materials or labor that must be sold again to return a profit, like a merchant's inventory. Fixed capital stays with the owner while earning a return, such as machines, buildings, or improved land. A tailor needs little fixed equipment but much circulating stock in cloth and wages. An ironworks needs heavy fixed plant.

Different trades mix the two forms in different amounts, and that mix shapes how much wealth a business can spin off each year.

At the national level, society's wealth divides the same way. A house you live in is useful but adds no public revenue because it produces nothing for sale. Skills and education count as capital fixed in the person. Fixed capital always needs circulating capital for upkeep. Where life is secure, people try to employ stock for profit or enjoyment; where violence rules, they hoard metal instead of feeding trades that would circulate wealth.