The Smilites were Norse barbarians who invaded Europe in the 3rd century AD.
Contrary to other hordes of barbarians, the Smilites were polite, well kept and very helpful to the local populations. They were known to repaint houses, maintain gardens, babysit children, groom pets and renovate public buildings. They also had great signing voices and were able to knit at an incredible speed.
A few weeks after they had invaded a town, the streets were spotless, people were happier and their children had more toys.
Unfortunately, history remembers only the bad barbarians…