One of the major causes of the stock market crash of 1929 was "<span>(1) excessive buying of stocks on margin" although it should be noted that there were several major factors.</span>
1. mutual defense allies,
2. imperialism,
3. militarism,
4. nationalism,
5. immediate cause: assassination of Archduke Franz Ferdinand
The popes ruled from France
William Levitt used his military experience in order to change the home-building industry. Levitt created several "Levittowns" especially in the Northeast part of the US. Just like in the military, these houses would be uniform in look and size. This helped to develop the modern day concept of a suburb and promoted uniformity during the 1950's.
Well, technically the religious unity never ended. I am not religious, but religion has been and will be apart of our society for as long as we can imagine.