Original sentence: Of these, it is pedophilia that is one of the greatest social problems/concerns of western society, especially since popular use has merged the concept of ephebophilia with that of pedophilia, which has become known as attraction to any individual considered too young to consent to sexual relations
Edited sentence: Of these, it is pedophilia that is the greatest social problem, especially since popular use has merged the concept of ephebophilia with that of pedophilia, which has become known as attraction to any individual considered too young to consent to sexual relations