"In few other professions are you required, each and every day, to weigh so many competing claims ... " (from an American book)
What is the grammatical reason for the inversion above - "are you" instead of "you are"? I feel it sounds quite right, but I cannot explain it satisfactorily. Ordinarily we use the inversion in interrogative sentences, but here we have an affirmative one.
If I changed the sentence a little bit to:
"In few other professions is one required ... " would it be also correct? and is such inversion mandatory?