I believe the emperor of China was influenced by Stalin and his communist movement which led to a rapid development
The AG industry was able to provide way bigger amounts of food. With higher amounts and productivity gave farmers a easier time to keep up with the growing population around the world. more people means higher demand for food in larger quantities.
The British army wasn’t strong enough to challenge German military which had grown tremendously over Hitler’s time; British leaders believed that hitler provided defense against soviet communism.