Try this one...
Taft falls ill in 1911,
Teddy, long unhappy with Taft Jumps in and gets the nomination. Without Taft to split the vote, Teddy beats Wilson.
Many of the reforms Wilson pushed Teddy actually favored. We still get the Federal Reserve and most of Wilson's progressive reforms. Teddy also pushed through programs that strongly resemble Social Security and National Health Programs (both were in his campaign platform). The big changes come in 1914.
Wilson spent years working on staying out of WWI, Teddy wanted in at the start. In this world the USA enters WWI in the summer of 1915. By 1917 Germany is exhausted and must ask for peace.
The Czar still falls, but Lenin doesn't get his chance. The
Russian Provisional Government holds and is seen as successfully ending the War. The Kaiser keeps his throne, but loses most of his power. The German people believe they were beaten by the allies not from enemies from within.
Leninism, Fascism, Nazism, and other extremist ideologies remain fringe ideas. Without the various unstable plans to keep an angry Germany down, or the massive damage of the later years of the war, the 1920's aren't nearly as unstable. Social Welfare spending soothes the pains of the workers, technology advances making the world richer, and the great Empires thrive.
The problem with this is that as the Empires thrive and bring order and education to the colonial masses (they only wanted education enough to make the colonial masses useful and to keep the missionaries quiet ) the colonial masses become politicized. As the colonial masses become politicized they become harder to rule. More forceful means are needed to keep order and maintain profitability.
Centrum sees this Q6 world as right up their alley. In the year 1950 the world has been in Tech Level seven for about 15 years. The general level of technology is a few years ahead of Homeline in 1950. There is no A-Bomb, thorium power generation (safer in many ways) is getting serious research and breakthroughs are being made,
Wernher von Braum came to America following grant money in the 1930's and ending up working with
Goddard and
Parsons in California. It looks like they'll get a rocket into orbit in a few years. The faster tech development annoys Centrum, but they assume they can deal with that later.
What Centrum doesn't know is that this world's Jack Parsons (who seems so much calmer and more respectable) is a member of the Cabal. His goal is to accelerate technological advances planet wide. He's already smuggled in out time scientists and engineers gathered up through his Cabal contacts. This Parsons knows what a Tech Level Eight world looks like and he means to get his world there by 1960!
It's basically a cloak and dagger techno thriller. The parallel is 90% Low Manna, 9% Normal Manna, and 1% High Manna.