Musicology,
“Opera” was first produced in Florence, late 15th century (see Wikipedia for:Florentine Camerata, Giovanni de' Bardi, Caccini,monody,chordal harmony
….a revolutionary departure from the polyphonic practice of the late Renaissance) to please and glorify -rather than chasten-the Medici. Soon after opera appears in Paris with Francesca Caccini (and possibly her father as well)
in the all-sung stage works her father composed for the wedding of Henry IV of France and Maria de Medici in 1600. In 1604 when the entire Caccini family visited France, Henry praised her singing effusively—"you are the best singer in all of France"—and asked her to stay at his courthttp://en.wikipedia.org/wiki/Francesca_Caccini
Hence the contradictory doubletalk in your-moth infected?-references ….
It is nevertheless clear that the Jesuit contribution to music in the 17th century was not insignificant.
‘The Jesuits were very alive to the propaganda advantages of these opera performances and some of their displays could seriously be said to have rivalled the splendour of court occasions.
….supporting my theory (actually Wikipedia’s) rather than yours.
Having then presented evidence absolving Jesuits of post 1773 events as well and having pointed the finger to “The encyclopaedists” in general (and "sui generis" in particular), I see no reason to your subsequent asking….
But now you tell us the Jesuit Order were not the pioneers of European opera ! Who then was more important than they in its development ?
…other than an effort to introduce your next "explanation",a mix up all of “conspiring” fraternities in a soup (for reasons I dare not imagine!)
By titling your book “The manufacture of Mozart”-thus drawing your reader’s curiosity to the identity of the manufacturer rather than long exhausted “product Mozart”-you now need provide an explanation, don’t you think?