The word 'glue' covers a huge number of products. Many are differently made. -Please be more specific if you expect a definitive answer,
White glue is made of polyvinyl acetate
Gorilla Glue was made in 1972.
No, glue never was made out of horse pee.
There were no doubt MANY 'famous inventors' who made 'glue' -Specify WHICH glue, then we can give a definitive answer.
Elephant Glue is cyanoacrylate.
glue
Glue guns are made in factories all over the world.
pva glue carpenter wood glue tacky glue
Usually it's a casein glue
plastic (polymer)
It is a version of PVC glue.
Crazy glue is a cyanoacrylite.