If someone thinks that love and peace is a cliche that must have been left behind in the sixties, that 's his problem.
Love and peace are eternal.
The sixties were notorious for the peace sign, make love, not war, love is all there is, non-violence, as well as: protests, ban the bomb, anti-war demonstrations, sit-ins etc. Mainly it was the young people of the times expressing themselves and establishing their disillusionment with the establishment.
There were varying opinions on all that was taking place at the time, definite concern about the young people's actions and plenty of poo pooing about all the peace and love slogans and the shenanigans of the youngsters. The world was getting a 'shaking up' by the younger generation.
When you are young and idealistic, you see things differently from the older more experienced members of society. You think you can save the world, that anything is possible and are willing to stand up with your peers and prove that to be so.
As you age, and life steps on you a few times, you may take on a far different attitude for some time. Life can be hard, there are obligations, bills, careers, illness, and distress. You make your way as best you can, foregoing the idea that you could save the world, wondering if you can save yourself. Once life settles down, the children are grown and you're more established, you might then realize that those ideals of your youth are still there, buried perhaps, but starting to make themselves known.
Well, there's no time like the present to start working on bringing those ideals back to life. After you spend some time on yourself, let the negativity go and get back to who you really are, you will remember that love and peace are what it's all about.... all there really is.