what led to the schism between the moderns and ancients

The division between the premier Grand Lodge, later termed the Moderns, and the rival Grand Lodge formed in 1751, known as the Antients, arose from a combination of ritual alterations, governance changes, and social friction 1232.

In the Craft, the premier Grand Lodge altered established practices to counter clandestine Masons and public exposures, changing degree words, shifting modes of recognition, and discontinuing the installation ceremony for lodge Masters 32. It also officially sanctioned making the Master's Part into a distinct Third Degree in 1738, which critics regarded as an unauthorized alteration of immemorial custom 3. Further division involved the Royal Arch, which the Antients conferred as an integral part of their system, whereas the Moderns maintained a separation between capitular working and Craft degrees 2.

Administrative changes within the premier Grand Lodge also fueled discontent. Power was increasingly concentrated by restricting Grand Office to former Grand Stewards and revoking the general Craft's right to elect Wardens 1. Mackey argues that social snobbery was the primary justification for the schism, as the Moderns increasingly shut out working-class Masons, whereas Irish Masons in London—excluded by the premier Grand Lodge—formed the Antients to preserve equality on the level regardless of social class 2.

In addition, religious interpretations created ongoing friction 13. Clergymen introduced distinctively Christian emphasis into the ceremonies, an issue Laurence Dermott exploited to portray the Moderns as departing from traditional faith 13. While Gould viewed the Antients as unlawful seceders, Mackey concludes that their emergence ultimately preserved the original design of the Fraternity 2.

To prevent members of the premier Grand Lodge from intruding upon their meetings, the Antient Grand Lodge altered certain modes of recognition 2. While Frederick Dalcho characterized these adjustments as minor—amounting to little more than a dispute over which hand received a glove first—they nevertheless contributed to long-standing friction between the two jurisdictions 2.

Regarding degree work, Laurence Dermott adopted the Royal Arch Degree for the Antient Grand Lodge 2. Albert Mackey outlines two theories concerning this development: either the Royal Arch had originally formed part of the Master's Degree before being severed, or it was invented by Andrew Michael Ramsay and subsequently adopted by Dermott 2. By incorporating this degree into their system, the Antients treated it as an essential component of Craft Masonry, laying the groundwork for its eventual recognition at the Union of 1813 as part of pure Antient Craft Masonry 2.