Generations are made using the tools and necessities ..not to forget the innovations,discoveries and exposure in a phased manner which lead to a phased change in thoughts,ideas and beliefs aka Generational Change..if you will. 

Can you leave without money,answer is “yes” and “no”. 

Yes-entirely depends on the socio-economic factors(you may hate it,but that’s the fact)

No-ibid 

What was once considered as human tendency,with the collective effort and dimensional changes in many years of experimental growth,has now turned into a natural tendency. Societal status has also led to greater tendency and rather acerbic and unequivocal belief in the system of Currency as not just a medium of exchange but rather a way of life.