So what is needed to bring about the unity of the entire human race?
Regards Tony
Respect for one another as being of equal value, the means to create wealth sufficient to feed, clothe, shelter and provide care for every person, a slightly more equitable way to share the wealth (resources) created -- without turning off the creative impulse that creates it (capitalism). A share in the decisions that must be made together (democracy). The desire that everyone has the right to choose their path, just as you do yourself, and perhaps willingness to help pick them up when the path proves to lead the wrong way.
A way to talk to one another so that we can be mutually understood (sometimes that requires art).
The recognition that we are one species, and interdependent -- much more so now, when we can save or destroy our entire planet, than we ever were before.
And a truly heart-felt desire that everyone should have the means to achieve what they wish for themselves, as you yourself would hope that you had.