So a quick Google search told me that nails apparently were not invented until sometime in the 1500s, which somehow I really doubt. I realized that I am having a much harder time understanding just how things were built and constructed in the ancient world. My books take place in an "advanced stone age" I like to call it, which is why I was hesitant to put the era in the topic title. I only call this a stone age at all, because this is an Earth-like planet, but with very little accessible metals on the surface. Most is found really deep underground. Thus, very little metal, and the main resources are wood, stone, sea shell, and bone. Despite this, the inhabitants of my world have hill forts (and if I to, I swear I'll just invent magic nails because I really do not want to get rid of the hill forts, lol), basket weaving, some pottery, and one specific race are master craftsmen with wood because where they live, there is so many freaking trees. So how were things constructed, say back in the stone age, or any other time before nails were invented? Where things lashed together with ropes and such? Was there some sort of adhesive being used? What about wooden nails? How feasible would those be? Even, say, if they were made from a special, enhanced wood that is about twice the strength, durability, etc, of normal wood found in our own world?