I've said this before, but imagine the WTS being given control over a small country (an admittedly unlikely prospect, but for the sake of argument...).
I guarantee that within a decade, democracy and religious freedom would be nonexistent, creationism would be mandated in schools, any alternative forms of sexual expression would be outlawed, disfellowshipped individuals would be stripped of citizenship and imprisoned or deported, and convicted apostates would be sentenced to death without possibility of appeal or reprieve.
Now take that a step further, and imagine that kind of regime on a planetary scale.
Lasting forever.