Hi! The main goal of the Magna Carta Project is to have a badged trail to each of the 250 or so Gateway Ancestors documented by Douglas Richardson in his Magna Carta Ancestry or Royal Ancestry. (See the list of these Gateways in the table at Category:Gateway Ancestors.)
Badged members help us work toward that goal by signing on to be a Gateway Guardian and developing a trail for that Gateway (names in the table that have neither a b nor a g are available).
The project manages the profiles for the Richardson-documented Gateways (plus a few) and oodles of profiles between them and the 17 Surety Barons (out of 25) that have descendants past the 4th generation. We also manage the profiles for the 16 Illustrious Men.
Anyone* interested in any of these profiles can become an Affiliate member & join the project's Google Group to help watch over them. Affiliate members do not have participation requirements to meet (Badged members do).
* Affiliates are encouraged to have the Pre-1700 Badge. Badged members need to have that badge and a few more requirements (see details [here]).
So... If you'd like to join as a Badged member, post an answer with the name of the Gateway you'd like to be Guardian for. If you'd like to join as an Affiliate, just add {{Member|Magna Carta Affiliate}} to your profile & send a join request to the Google Group (include your WikiTree ID).
For more info, check out the project page and the project's "Quick-Nav Index". For project-specific terms, such as "badged", see the project'.s Glossary