Things are changing, so saying we have dealt with problems before and expecting us to deal with new ones is not realistic.
Population is currently exponential, even if its growth might slow its still growing.
Climate is changing.
Oil, Water, Wood, Food is running out. Its being consumed faster and faster, even for populations that are not growing like the UK one.
The differences will become more noticable. So even now we can see differences between us and our parents. Soon you will see differences between one decade and another that are as great as us and our parents.