Vissoof.
AT-AT Assault 🏳️⚧️That's honestly a good question. Depending on the field, a 30 year old paper can be woefully out of date, and most likely wrong given modern knowledge.
Krišs@atatassault @Viss it appears that Mr. Penniman is a historian of Christianity (https://www.linkedin.com/in/johnpenniman/), so "late 1900's" is most likely just fine in his field.