Why? The temperature in and of itself matters less than the total energy in the system and whether it supports life as we know it and the systems we've built to

Why? The temperature in and of itself matters less than the total energy in the system and whether it supports life as we know it and the systems we've built to depend on it. If we go through a temporary spell where temperatures are ahead of the average, thanks to alignment of various factors like El Niño etc, we get to see a flavour of what's coming. Just like the recent heat wave in Europe, or more extreme storms, perhaps even extreme cold events, changes to trade winds or Gulf Stream etc and local areas of cooling. Who knows what will tip over the edge from borderline into extinct or broken? Who knows what previously unforeseen consequences will result? Or how near to uninhabitable some places become. Perhaps Australia, perhaps somewhere more populous like cities in India or Bangladesh. The significance then, is a taste of things to come may provoke action, or even acceptance among those who pretend it's not happening. The trend is so clear I don't have too much hope here. It's mostly academic what temperatures were 7,000 years ago. There were a minuscule fraction of today's population with only somewhere under 20m humans globally. Living an undeveloped lifestyle. No global agriculture with fragile global supply chains and production targets. Plenty of animals to hunt, plenty of extra land owned by no one, no hard borders. Plenty of local deaths due to drought, flood or pestilence too. Yet even with a tiny number of humans, archaeology points to local climatic changes as prime suspect of the fall many civilisations including the ancient Egyptian.