This movement is said to have been largely inspired by the "indignados" movement that appeared in Spain after the publishing of Stéphane Hessel's book "Indignez-vous" (Time for outrage), and that quickly spread to other European capitals (Athens, Paris, Brussels).
Hessel's book is about the personal responsibility of every citizen to oppose injustice and it criticises the influence of the financial/corporate world on today's domestic politics in most countries.
I live in Paris, and the evolution regarding the increasing poverty and unemployment of the population is very hard to bear when you consider that most companies make billions of profit, yet sack half of their staff just to stay competitive in an obscure way and put thousands/hundreds of hard working people on the street.
Wall street is at the heart of this problem, investors now buy cereals and rice to speculate, causing famine and food riots in various countries while they sit on tons of basic-need-products just to make profit.
I'm part of the lucky ones, I have a job, but every day, there are more people living on the streets, and today, it's not the lunatics and the anti-social any more, it's grannies and families. We're supposed to be the rich part of the world and this situation can not be tolerated any more, it's a shame for all developed countries.
This movement is simply about putting the human first again, before the needs of a capitalistic society.
I'm not an anti-capitalist, neither particularly to the left or to the right, I've never found anyone worth following, but our system is being a victim of the same problem that brought down every other system before: the greed and indifference of one human to another, this is what this movement tries to change and I support it for that, even though a good part of those who participate might not have the exact same opinion regarding the solutions that I have.