Last days - rather not. In history so many people believed that the last days will happen, for example, the migration periode in the roman times, the black death, … , till 2012, where the world should end. Humanity learned of this situation (I hope so). But the climate change is a natrual phenomenon - we just make it happen faster.
Indeed, I can’t deny what will happen. Overpopulation, water/food shortage and the loos of living space could cause a war. I think that many people will die - if humanity won’t do a thing, but this is thanksfully not the matter. No other generation than generation Z think about the environment and the society gained credence to other looking people, other countries, other religions, other genders and so on. We even have an organisation, who is responsible for peace - the UN.
No, I don’t think that we are living in these last days - we are living in great, awesome, beautiful days. Humanity is learning slow, but it learns. What the world needs, are people, who believe in the future of this world and humanity - no matter if with the help of the bible, the quran or other religions.
We are after all humans - dreamers.