Moreover, the suffering that can be inflicted through disturbance within the
human body indicates the
extent to which general biological health and «material» security constitute happiness, although the fact that these ends dominate the lives
of most people in the contemporary world indicates how far short
of its
possibilities the
human race remains.
While an unidentified source
of this type could I suppose be considered a theoretical
possibility, it is not only implausible in the absence
of evidence, but also unnecessary in the presence
of strong evidence for the
human role at the
extent deducible from the multiple lines
of evidence available.