"Sharp division" refers to a strong and clear separation or split between two or more groups or opinions. It suggests a significant disagreement or conflict that is very evident and noticeable. Full definition
It does not have sharp divisions between various spheres of human society or branches of power. (christianitytoday.com)
There are not sharp divisions in the stream of thought, no mere succession of unrelated states, but a flow from one state to the next. (religion-online.org)
SHARP DIVISION OF CULTURES Some years ago I came across an article titled «It's the Culture, Stupid», but in fact many articles I've written might well bear that title. (faith.org.uk)