[Astromancer]

Try this one...

Lucifer-7

This Q6 Low Manna world diverges in the 1870's when an asteroid fragment strikes central Asia in 1927. The fragment is large enough to cause worldwide chaos for thirty years. Basically, an ice-age like cold snap from 1927 to 1957.

Most major nations collapse, especially in Europe. China and India are hit with Mega-droughts, Australia, New Zealand, California, experience milder forms of weather issues, and North Africa and the American Southwest, actually have mild and gently rainy weather.

It's now the year 1960, world population is around one billion, half of humanity died in the cold snap. The Union of the Southern Cross (Australia and New Zealand), the North American Union (the Remnants of the USA, Canada, and Mexico), France Outremere (North Africa but retaking Southern Europe as North Africa returns to desert), and Brazil(which controls most of South America), are the major powers. There are small islands of Tech Level Seven, most of the world was lucky to hold onto TL6, and large areas are TL5. This should change rapidly as trade reopens.

This world interests the Cabal because those born since the asteroid strike are about fifty times more likely to be PSIs. Parapsychology is becoming a thing on this world. Neither Centrum nor Homeline is yet aware that this world is anything other than another world where people believe in PSI whether or not PSI is real. The Cabal means to keep it that way buntil A) they discover why the number of PSIs is so far up, and B) they've cherry-picked the best talent for themselves.