The Georgia Guidestones are a GLP mainstay.
In a nutshell, some mysterious guy known only as 'RC' commissioned the project on behalf of unknown others.
The large granite stones are astronomically positioned and contain instructions for how to live on this planet.
These instructions are written in 8 modern languages and a shorter message in 4 ancient languages.

1. MAINTAIN HUMANITY UNDER 500,000,000 IN PERPETUAL BALANCE WITH NATURE

2. GUIDE REPRODUCTION WISELY - IMPROVING FITNESS AND DIVERSITY

3. UNITE HUMANITY WITH A LIVING NEW LANGUAGE

4. RULE PASSION - FAITH - TRADITION - AND ALL THINGS WITH TEMPERED REASON

5. PROTECT PEOPLE AND NATIONS WITH FAIR LAWS AND JUST COURTS

6. LET ALL NATIONS RULE INTERNALLY RESOLVING EXTERNAL DISPUTES IN A WORLD COURT

7. AVOID PETTY LAWS AND USELESS OFFICIALS

8. BALANCE PERSONAL RIGHTS WITH SOCIAL DUTIES

9. PRIZE TRUTH - BEAUTY - LOVE- SEEKING HARMONY WITH THE INFINITE

10. BE NOT A CANCER ON THE EARTH - LEAVE ROOM FOR NATURE - LEAVE ROOM FOR NATURE

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So what do we put on the GLP GUIDESTONES?

Here is my suggestion:

1. Respect all diversity, even the tardiest tard has something valuable to bring to the table.