@junior771,
It's (probably) a bit of laziness
and creativity.
Consider that people would have to have imaginations in order to best figure out how to create something new.
But the primary motivator? Your pal is likely to be right. It probably, for the most part,
is laziness.
But it's not laziness in terms of moral failings or the like. Rather, it's about conserving energy.
Consider our cave dwelling and even back to our tree dwelling ancestors. For sake of argument, let's say they must have 500 or more calories per day in order to survive, and 1000 or more to thrive.
Meat tends to be more calorically dense (generally due to its fat content) than grains. But meat, for Neanderthals and back to Australopithecines, is "expensive" to get calorically. This is because animals don't like being killed (who knew?). So, prey animals run. And predator animals have sharp teeth and claws and will fight back.
Bringing down 20,000 calories in game had better "cost" less than 1000 calories apiece if there are 20 hunters in a hunting party. This doesn't even get into potentially bringing any meat back to the rest of the tribe. But if the hunting party is made up of only 10 persons, then there's more caloric wiggle room. Or the 10 hunters expend less than 1000 calories apiece
and there's enough to take stuff back to the tribe.
How do you expend fewer calories in bringing down the game? Here are a few ideas:
- Pitfall traps - just let the game chase you and fall in, assuming you can get it to run the way you want it to and do so before the hunters expend too many calories.
- Spears - they extend your reach, and they do so with something on the end that's sharper than fingernails. Cultivating better skill in making spears and spearheads isn't laziness. It's the opposite of laziness. But it eventually serves the same end, to expend fewer calories.
- Throwing rocks - the range isn't as far as spears but you don't have to know how to craft a spear. If you find a good, sharp rock, then you can even get away with not knowing how to create stone tools. This may very well have been how some forms of hunting started in the first place.
- Lastly, the greatest method in terms of serving the laziness vibe is scavenging. You don't have to be able to bring down game. You just have to be able to drive off the rightful owner(s) of the game.
There's a fifth method, actually. It's bringing down a lot more smaller game, and getting to 20,000 calories that way. But the downside of that method is it takes time. And it may end up expending more calories when all is said and done.
Your lazy Neanderthal or Australopithecine dreams of grabbing those calories with less effort. Your creative prehistoric ancestor figures out how to do that.