It symbolize the political and economic division between the democratic west and the communist east.
It connects the book's ideas about early bicycle variations.
Look at the picture, you see a bike from today's decade and if you look down the picture of bikes you see them down playing the bikes and also looking forward you see them upgrading the bikes.
The Christian Church had served and provided social services for the people. It was a part of the change for the western countries. It has played a role in culture, politics, and religion. It also gave influence of Christian celebrations such as Christmas and some Christian events. It also helped in establishing schools and preserving philosophies centuries old. It had been a proponent to give deeper value on humanism, morality and family orientation, which is mostly preserved by the Christian Church.
Because he had the greatest minds of all time.