"So, religious people (at least in the United States and other religious countries) are happier on average than non-religious people. But, the key variable does not appear to be religion itself. Instead, it is the social connections that religious life facilitates that make people happy." - Clay Routledge Ph.D. Are Religious People Happier Than Non-Religious People?
As usual, sweeping assertions made by the Governing Body of Jehovah's Witnesses are not backed up by the empirical evidence.