The World Anthem composition and lyrics were composed using ExperimentsIn Musical Intelligence – a computer system that scientifically analyzes the common notes, tendencies and lyrics of musical work.  The brainchild of Music Professor David Cope, Experiments In Musical Intelligence links together notes, harmonies, rhythms, words and sets of instruments conforming to what makes musical sense.  Eventually, a pattern emerges that captures the most important part of the human composer’s musical style. Experiments in Musical Intelligence supports the creation of new music that simulates the style of music by diverse composers and from diverse cultures.

    This same process could have been done by hand using musicologist formulas; we chose to use Experiments In Musical Intelligence in order to keep the project unbiased, eliminate human error and because of the shear volume of the project.  Although a computer was used to create the World Anthem, a computer did not write the World Anthem – it wrote itself.  No one person or nation created it.  Each nation is equally represented. 

If you want more detail, read the article “Requiem for the soul” published in New Scientist Magazine.

http://www.newscientist.com/article/mg15520945.100-requiem-for-the-soul.html

You can also get more information from a number of Professor Cope’s published books on the subject.