I see religions mostly as Conway's game of life - blips of colors fighting for territory using various ways, sometimes removing the competition, sometimes behing destroyed by competition, sometimes dying by themselves, etc.
It's like competition in a soul market :-)
But in what they do, they seem push humanity forward, to give a reason, a hope.
Yet I would be worried if a religion achieved dominant status (monopoly) in a way that could be used to eradicate newcomers and innovation.
We already have an oligopoly - see the problems it makes on a worldwide scale.