The measure of 21 meters comes from numbers not chosen but found. It is this that explains the others that came from it, 42 and 84. This is part of the geometry that exposed itself as I worked through the design.
This initial campaign also has relevance from a couple directions. One such calculation is that if you feel yourself as one in a million then now is your chance to do just that. The second calculation is 8 rings of 14 persons. These positions will allow those who partake to become the needed initial critical mass. You will certainly become part of what dreams may come. Join and become one of the initial 112 people. The one in a million is explained elsewhere in building projections for the year 2032.