I don't know why your title bothers me so much, but you are talking about a possessive, "Humanity's…

I don't know why your title bothers me so much, but you are talking about a possessive, "Humanity's Impatience," and not a plural with "Humanities." You are not talking about multiple expressions of humanity ("humanities") but about us, the singlular humanity, that your article questions whether it is impatient. I'll drop it, but it's an easy fix. :-)