6 months old is the answer
Increased level of education and focus on careers--as women have the ability to have relationships but also provide for themselves, marriage is not a necessary option.
Birth control and access to college education has allowed women to focus on careers instead of family. They are able to still have successful lives but not have to worry about balancing a career and a family.
Answer:
Archduke Franz Ferdinand was murdered.
I read it somewhere.
