Financialization is tied to the transition from an industrial economy to a service economy, as financial services belong to the tertiary sector of the economy. 

People are so individually different in values/ambitions/knowledge/skill/personality etc etc they start thinking about their own needs and run in different directions. Sooner or later what holds the group together is nothing. Philosopher Charles Taylor calls it the immanent frame but they don't teach Philosophy these days.

Things that last are Religion (shared stories that hold people together).

Religions have learnt long ago (the hard way) keeping very different types of people together for the long term, involves making them focus on something much larger than themselves.

So we still have the Vatican or Islam or Judaism or Hinduism etc that have lasted longer the Nations. Nations come and go.