The spear is the standard weapon of nearly every nation in the world. It's reliable, cheap, and easy to utilize (pointy end toward enemy, push hard) for the common soldier. While not necessarily the be all end all of military hardware, there will be a place for it in the future for a long time to come, as it has been with us in the past for so long of a time, being one of the first proper weapons shaped and created at the hands of Humans.