How can humans change our world in such bad way?!!Where is the sense of justice?!!

Where are all the people who want to improve the world we live?!
Those who fight for that?!
Where are all those politicians who believed in
a more just world?!
a world full of dreams?!
a world of equality?!
Is now all are corrupt and only seek to satisfy their needs?!
There was a time when people fought for equality between women and men
There was a time when people fought against slavery
There was a time when people fought against racism '
There was a time in which they spoke about "the dream"
Today there are only
embezzlement
crisis
wars
nightmares
personal interests
Today all the rest was disappearing
If today there were some men as in the past, everything could be different.
They could not be many, but they made ​​all the difference, because people did believe in a better world.
Today, we can't see one, population fight alone against the stronger, because there is no strong who fight with the weak without fear.