Sam Sloan wrote:

FIDE is the largest organization in the world, in terms of number of
nations. There are at present 158 member nations of FIDE.

Sam, you are a really funny. I mean, such an article, where you took all
the effort to collect the list of nations - when reading the subject my
immediate reaction was: ah, at least an article without any dispute.
Alas, your love for superlatives and your lack of interest in checking
your facts hunts you here as well. FIDE is not even close at being the
largest organization in terms of number of nations. The Fédération
Internationale de Football Association (FIFA) has currently 207 members.
As everybody knows: football (a.k.a. soccer) rules this planet.

Greetings,
Ralf