The Human Race
It was a high chance that glyptodons were herbivores and had large claws and armors. Their design meant they were up against other major predators that they needed to protect themselves from. For sure, the ice age did a lot of damage to their existence, but they were not able to keep humans away as effectively as they wanted to. It turned out humans led them to become extinct faster than we imagine as they were hunted a lot. All because of our fore-parents and those long before, the animals probably became the first to go into extinction. So, why did humans hunt them so much?
Their Shells
Glyptodons were hunted for a lot of reasons by humans. First off, their shell is pretty huge, and as such, humans wanted them as a form of shelter. It is also believed by many that people who lived in those days lived in caves. So, there might not have been a lot of caves in existence, and seeing the shells could hold around 2 to 3 people, it was quite useful. Interestingly, there were also other reasons why they hunted them.