Gumby,
The society explains "the founding of the world" to mean AFTER Adam was born.....
Lol, I had forgotten that one...
The real problem of "fromthe founding of the world" (apo katabolè kosmou) is not whether kosmos means the world or just "mankind" (as per the WT... and JosephMalik maybe ). At a purely semantic level, the scope is "cosmic" (!) even though only human history may be practically concerned (just as "always" or "everywhere" may actually refer to very different time or space ranges while keeping the same potentially infinite sense). And reducing katabolè to "AFTER Adam was born" (born?) is completely arbitrary (resorting to Hebrews 11:11 where, in a completely different context, descendants are explicitly referred to, katabolè spermatos,doesn't cast any light on apo katabolè kosmou).
The real problem is whether apo... (from...) means that the action has occurred at the beginning or has been occurring ever since the beginning. Whether the names are all written there since the foundation of the world (implying a pre- or supra-temporal view, apories intended) or have been written all along (implying a simpler temporal perspective). Same for the "lamb slaughtered" if one prefers the lectio difficilior (but see 17:8, where the same phrase is used of the names written in the book without the lamb slaughtered).
Luke 11:50 favours the second option (the blood of prophets has been poured throughout history); so does Hebrews 9:26: "he would have had to suffer again and again since the foundation of the world". Matthew 13:35; 25:34; Hebrews 4:3 can be read both ways.