There is a phenomenon in both the physical sciences and in human interaction known as the tipping point. In common language, such a thing may be referred to as “the straw that broke the camel’s back,” a “point of no return,” or “the last straw.”
That such things exist, in nature and in human society, is widely recognized. It is often easy to see exactly where that point was in post event analysis. Ah, but seeing it as it comes over the horizon – that is much harder. Discerning the tipping point is a fascinating process.