Im going with pictorial data
The United States has the largest Christian population in the world, followed by Brazil, Mexico, Russia, and the Philippines.
Great Britain was fully industrialized with it's cities having smoke coming out of it's factories from as far as your eyes can see and making materials and products that were traded almost all over the world. Unlike Britain, Russia was the complete opposite. Russia was a mostly had agricultual economy with a serfdom system that was more than 200 years old, having little to no factories and it's products, materials, etc coming from industrialized countries like Britain, France and the various German states at the time.
