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Joseph means to say that the younger generations of his time had never experienced what his generation had. The young were complaining or discontented with the current situation and had no perspective on what the older generation had to go through to get it to where it is now. He would be disappointed in modern America, because people now a days don't realize how good they have it to be living in a prosperous country like this. They don't realize all the things people of the past had to sacrifice and fight for to gain the freedoms and privileges we have now.  

i believe it’s the first one, but it could be the second! not the third or fourth.

explanation:

um hi, hope this answer !