We may now have reached a point where this gap in our make-up has become unsustainable; partly because what in the past would have counted as material plenty has become the norm for the majority in much of the world; and partly because the slow retreat of religion that coincided with the spread of a capitalist economy has left a gaping hole in millions of people's lives. (Geoff Mulgan)
In order to be happy we must first possess inner contentment; and inner contentment doesn't come from having all we want; but rather from wanting and appreciating being grateful for all we have.
If one's cause is supported by sound reasoning, there is no point in using violence. It is those who have no motive other than selfish desire and who cannot achieve their goal through logical reasoning who rely on force.