Usage of "on"

[Klpno]

Hello everyone,

I'd like to ask about the usage of "on" in a sentence in the following context:

What you hold in your hands is no less than a collective miracle between WE of the Subterranean Community and the author of this book. It is a miracle of love, dedication, and heart-felt desire between kinsman and family. I am privileged and honored to be able to come forward to present this collaborative effort on behalf of Telos and those of us who dwell beneath the surface on this beautiful planet which you call Earth.

My name is Mikos, and I am a resident of the city of Catharia. I am a Catharian from the Library of Porthologos, located in the HOLLOW EARTH beneath the Aegean Sea. This communiqué is in honor of the publication of the messages from our sister-colony, TELOS.

I might well be wrong, but I think it should be "of" not "on".

[Milanya]

I do not think you are wrong.
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con·text - The part of a text or statement that surrounds a particular word or passage and determines its meaning.

[Klpno]

Thank you, Milanya!