integ, Assemblies're probably a different thing. Many attend simply for the social bonding; the same goes for high-profile JW events. Save for those who have nowhere else to go and those who're ruled by fear (of rejection, of losing their social connections and those simply too old to leave etc - which is pretty much a large chunk!), the JWs are in some trouble. The younger generation aren't joining in; it'll be a while before it all becomes clear. In my area, new JW members are usually refugees; in the local congregation, no native has been baptised in the congregation for over 5 years except for 2 children of JWs, yet, attendances of PT and WT Study 're good.
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