
I ended the previous bit with the claim that competition in a second-best world can be bad.
Competition in a free market is nearly always good because it is that process which provides the incentive to market participants to do the best they can, which leads to all the advances we all enjoy.
Remember that every one of us is a market participant. Therefore we all have to compete. It doesn’t have to be cutthroat but we cannot avoid competing.
But what about cooperation? Doesn’t that matter? Yes. It matters enormously. We even have to compete in our cooperation. Individuals who are good at cooperating out compete those who are bad at cooperating. This holds true for higher levels of aggregation too. More cooperative, high trust cultures do better than cultures that mistrust and don’t honor their word.
In a perfect world, which in our case we don’t have, competition would always be good for everyone. Even those who lose out in their particular competition would nevertheless be better off in this world of competition because competition raises the general level of welfare, than they would be in a world without competition.
We humans value economic goods. But everything we value doesn’t necessarily have to be an economic good. What’s the defining characteristic? The demand for the good has to exceed the supply for it to be thought of as an economic good.

Economists are uniquely qualified in their understanding of one particular aspect of human activity, and that activity is unique to humans. No other animal trades, or exchanges, among its kind. Adam Smith wrote that “the propensity to truck, barter and exchange one thing for another is common to all men, and to be found in no other race of animals.” And no other discipline focuses on trade as much as economics does. Indeed, the most parsimonious description of economics is that it is the systematic study of trade, and trade-offs.
Here’s a graduation speech that won’t tax your time and, without taxing your brain, will remind you of what is worth remembering. In 2007,
When people get to know that I am an economist, for instance on a flight, I often get asked about the economy or even the stock market. I just make up some stuff if the mood strikes me but sometimes I tell them that I don’t know. You tell me, I say.
Basic economics partitions goods into private goods and public goods, and property into private property and public property. Private goods are defined as those goods that are rival — one person’s consumption of the good reduces the amount available for others to consume — and excludable — a person can be prevented from consuming the good. Thus a cookie is a private good. A cookie eaten reduces the stock of cookies, and cookies can be locked up.