[kinsman redeemer]

its 1001 doctrinal varieties

You said "thousands" a few days ago and I said "Either list the 'thousands' of protestant sects or use a different number."

Thanks. So, I assume you have a list of 1,001 now.

Care to share?

[Steelfish]

You asked for the source?

The World Christian Encyclopedia (David A. Barrett; Oxford University Press, 1982) apparently estimated almost 21,000 denominations, and the updated World Christian Encyclopedia (Barrett, Kurian, Johnson; Oxford Univ Press, 2nd edition, 2001) estimated at least 33,000. “Denomination” is defined as “an organised christian group within a country”.

The Center for the Study of Global Christianity at Gordon-Conwell Theological Seminary estimated 34,000 denominations in 2000, rising to an estimated 43,000 in 2012. These numbers have exploded from 1,600 in the year 1900.

[ealgeone]

what steelfish is not telling you, and it doesn't surprise as catholics like to cherry pick things, the same source cited notes:

242 roman catholic denominations!

so much for "one" church roman catholics love to bandy about.

however, a lot of this is driven though by how a denomination is determined.

I think daniel1212 may have some additional insight on this.