The attitudes described in the quote, to me, seem like somewhat predictable responses to the many changes that the world was undergoing in the 1940s.
It's no coincidence that today's world seems to fit the same description as we experience many changes too.
To suggest that people are losing their ability to believe or to hope is to ignore the many positive movements which have taken place in the last few years and which continue to occur.
The Arab Spring, for all its difficulty and eventual violence, has been a sustained social and political movement calling for representative government in an area of the world where despotism has too often been the norm. The only way the movement could have gained the success it has is because people believe in change (though that success remains a qualified success, I know).