Exactly!
I was wondering how the author of this piece swallowed that movie as fact.
Spartans used to leave their weak and sickly newborns on hills... to die.
The rest were kicked to see how loudly they screamed, and sorted accordingly.
As for Xerses, the Spartans were fighting their neighbouring Greeks as much as they were, the Persians.
You mean as opposed to, say, aborting 40 million in 26 years and not allowing them to even be born to find out if they were "weak and sickly" or not?