In the universal order of things the top of an inferior class touches the bottom of a superior: as for instance oysters, which, occupying as it were the lowest position in the class of animals, scarcely rise above tile life of plants, because they cling to the earth without motion and possess the sense of touch alone. (qtd. in Berdine)
Baldock is artifically raising his status by stating that his "gentry" he "fetched from Oxford, not heraldry" (Edward II II.ii.242-43). The OED also states that "to fetch" also denotes "to steal," which carries a negative implication. Likewise, the word alludes to something that is commodified--an object that can be taken, sold, and otherwise easy to obtain, rather than something that is given from on High by some otherworldly power.
The fragmentation of the Elizabethan World View furthers the corrupted state of the kingdom under King Edward II's reign.
(sorry this is late, I totally forgot I was supposed to post on the group today)
Work Cited
Berdine, Maggie. "The Elizabethan World View." The Elizabethan World View. West Virginia University at Parkersburg.