How did the People’s Progressive Party split along ethnic lines?

The People’s Progressive Party (PPP), originally founded in 1950 by Cheddi Jagan and Forbes Burnham, experienced a significant internal split in 1955 that solidified along ethnic lines.123

During this period, the party divided as most of its Afro-Guyanese members seceded under the leadership of Forbes Burnham to form the People’s National Congress (PNC). Meanwhile, the members of East Indian descent remained within the ranks of the PPP, which continued to be led by Cheddi Jagan. This division established a long-standing pattern in Guyanese politics, where the two major parties became traditionally associated with these specific ethnic groups: the PPP as the party of the rural Indo-Guyanese and the PNC as the party of the urban Afro-Guyanese populace.234