We can instantly discount religion. Although it is one's right to believe in such nonsense if they so choose, with the current rate of advancement the world possesses, religion will hopefully one day soon become obsolete. Humanity's need to explain EVERYTHING is taking on a different method to purchase the same means. 
Now, those who read this and are religiously devout may immediately discount our cause, believe 'oh they've offended my religion, that's not how to get my vote.'
But this isn't about 'winning' everyone.
It's about CREATING an everyone. When has there ever been a time anyone could ever say 'everyone' without referring to a select group?
No-one refers to the world's population anymore because there isn't one - rather, a giant group of groups.
This isn't to say that religion is utterly wrong. Their codes of conduct are completely correct and agreeable. Peace, love. Unification (so long as it benefits the religion somehow).
The three things most difficult (and funnily enough the most desirable to those wishing to further humanity) things in the world to achieve.
In all honesty, peace, truth, love, and acceptance are the only REAL currencies that are valued. We are nothing but sophisticated animals, and we are to do nothing but reproduce. 
The faster we accept our pointlessness, the faster we create one ourselves. There is no solution to a problem that can't be identified