Like gelatin, casein, starch, horn glues? They are old as dirt.

Tree resin you can get ahold of on accident, light a green piece of wood on fire, you get glue. Animal products can turn to glue with again just leaving it in a fire a long time or a hot enough fire. Humans have been making stone and other tools a lot longer than Homo Sapiens have been around.

Where do you think Gorilla Glue comes from?