While there's a singular author ("Leo"), these writings are often created in consultation with other people:

> Francis, for example, did not write Laudato si’ entirely on his own. The first draft was prepared by the Pontifical Council for Justice and Peace, with input from other Church leaders. The document was then revised and reviewed by the Vatican’s Secretariat of State and the Congregation for the Doctrine of the Faith.

But I meant mostly those who share "Leo's" errors and write like him ("these people [like "Leo"])

https://news.ycombinator.com/item?id=48188156 this person is known for challenging papal authority.