The generation that Jesus spoke of has probably already been born. Jesus said that during that specific generation because of the increase in lawlessness the love of the majority of people would cool.
If we look at crime historically around the world even as recent as the 70s people were friendlier and more loving. People could travel around the world even into the Middle East and never have a problem. In this country you could hitchhike without having to worry about getting robbed or killed. I recently watched a documentary of people living during the 20s and 30s where they would travel and instead of a hotel they would simply knock on a strangers door and the family would give them shelter and food.
The point is the world has clearly taken a turn for the worst with some things that Jesus described back then are happening today. Just like the fig tree illustration he used.
Jesus said that when that specific generation saw all of these things that it would signal the beginning of the end.
I used Matthew chapter 24.