Why not build just one Human Development Center before building them in cities around the world?

[Humaniteer]

HUMANITEER ✫ for humanity's human development centers will be built as
globally interconnected venues that care for their local communities
while offering its members a place to connect, learn from one another,
and simultaneously co-organize with other centers around the world to
form a new societal model where every person is cared for, fed,
clothed, sheltered, educated and free.

Figuratively, these development centers will serve as the skeletal
structure of a new societal model (a newly born humanity); to build
only one would be like a human being developing only one rib, and
waiting for this rib to be fully formed before developing subsequent
ribs. This process would not sustain the human being. Humanity has
come to a point where it must now form its skeletal structure; each
rib (each human development center) must be formed together — each
center developing and strengthening as one, thanks to the shared
resources (cultural, intellectual, etc.) of each other.

The purpose of these human development centers is to interconnect our
world's diverse cultures and offer places for our world's people to
come together, learn from one another, and simultaneously co-organize
with other centers from other countries to cultivate a happy, healthy
and united humanity through the design of a new and humane societal
model. To build only one of these centers, say in only the USA, would
defeat this purpose.