Production itself is a naturally cooperative effort.

While it is certainly possible to imagine Og, the primitive cave man, sitting in front of his cave and chipping stone spear-points without any help from anyone, even Og will not be able to make very many spear-points if he has to continually interrupt his production in order to procure food for himself, find stones of the proper shape and hardness, cut down trees or scour the forest for sticks to make in to spear-shafts, and so on.

The general rule for efficient production is that it requires the sort of help and assistance that one gets from others.

This help might be direct, in the form of the labor or physical effort needed to shape the shafts, chip the stones, and to lash them together – or it might be indirect, in the form of tools made by the labor of others -- (for example,  a really nifty spear-point-chipping tool that Og acquired from his cousin Zug for the price of two spears and a tasty side of antelope meat.)

For a more modern example, a writer (whether of screen plays, weighty textbooks, or trashy romance novels) often thinks of himself as being entirely individualistic and not needing the help or assistance of anyone in producing his works.