anchor: Without this wildly curving water tunnel, cut through the bedrock under Jerusalem by frantic teams who worked from both ends to meet in the middle, Judaic monotheism would have been destroyed and the development of Western civilization would have been considerably altered.
positive: Had it not been for this water tunnel, Judaic monotheism would not have survived.
negative: The construction of this water tunnel led to the destruction of Judaic monotheism.