What effect did the dispute between the orthodox and the roman catholic churches in the 11th century have?

The two churches split apart permanently.

Explanation:

The splitting of the churches in Europe in the 11th century happened when Pope Leo IX came to Constantinople to meet the Eastern patriarch to solve the conflict of religion. Both did not agree on matters and excommunicated each other, which led to the Great Schism (split) of 1054. The Great Schism divided Christianity into two-part known as the  Eastern Orthodox and Roman Catholic.

russia because it is the biggest state

a reason that was key to coolidge's victory in the 1924 presidental election was that; democratic party supporters were split in the north and south.