M
Mystophilus
Guest
“Whoever”, not “Whomever”. Sorry, but it irks me.Whomever wrote this is trapped in his own ideas and enslaved to himself.
“Who” is a subject form, for the entity which operates the verb “wrote”; it works like “He” in “He wrote”. The “ever” is just an intensifying suffix, and so we can ignore it for this purpose.
“Whom” is an object form, for an entity which the verb operates upon, like “him” in “I kicked him”. Note the consistency of the -m ending.
The easiest way to test this is thus to isolate that clause (the first three words in your sentence) and see whether you could substitute “he” (“he wrote this”, fine; “I called he”, not fine) or “him” (“him wrote this”, not in Standard English; “I called him”, fine) for the “who” form: “he”=>“who”, “him”=>“whom”.
These days, however, you can just use “who” there, because so many people have forgotten how to use “whom” that it is dying out.
/rant