Can't help to think about John Carpenter's Village of the Damned when I see the photos of The Family's kids. I just learned the film was a remake of a 1960 movie bearing the same name. The story comes from the novel The Midwich Cuckoos written by John Wyndham. It was also adapted as a three 30-minute episodes which aired on BBC in December of the year 1982. The book was published in 1957, while the cult's timeline starts in 1960.

During World War II, Wyndham first served as a censor in the Ministry of Information...

The Ministry of Information (MOI), headed by the Minister of Information, was a United Kingdom government department created briefly at the end of the First World War and again during the Second World War. Located in Senate House at the University of London during the 1940s, it was the central government department responsible for publicity and propaganda.

Some similaties between the Great White Brotherhood's children and the fictitious kids:

• dyed blonde hair
• 28 children (31 boys and 30 girls in the sci-fi novel)
• the co-founder had an interest in parapsychology (in the movie the boys & girls possess telepathic abilities)
• they were adopted (the Village of the Damned children have none of the genetic characteristics of their parents)
• ''...may have been an Australian MK-Ultra outpost'' (The Midwich Cuckoos kids use a form of mind control)
• ''Outwardly the children were very well behaved and even sang, they looked like the perfect family.'' & ''Modern day Assange talks in a monotone and seemingly emotionless manner.'' (''They dress impeccably, always walk as a group, speak in an adult manner, and behave maturely, but they show no conscience or love, and demonstrate a coldness to others...'')

Overtaking the World?

The "cuckoo" in the novel's title is in reference to the bird, of which nearly 60 species are brood parasites, laying their eggs in the nests of other birds. These species are specifically obligate brood parasites, in that they only reproduce in this fashion, with the best-known example being the European common cuckoo. The cuckoo egg hatches earlier than the host's, and the cuckoo chick grows faster; in most cases the chick evicts the eggs or young of the host species, while encouraging the host to keep pace with its high growth rate.

https://en.wikipedia.org/wiki/Village_of_the_Damned_(1995_film)
https://en.wikipedia.org/wiki/Village_of_the_Damned_(1960_film)
https://en.wikipedia.org/wiki/The_Midwich_Cuckoos
https://en.wikipedia.org/wiki/John_Wyndham
https://en.wikipedia.org/wiki/Ministry_of_Information_(United_Kingdom)