I am firmly in the gloom and doom group. We have evolved enough to know better but we continue to destroy our world with our wonderful technological and scientific improvements. We clear cut forests, disregarding their importance to our health and animals/birds,; we use pesticides widely, destroying pollinators; we eat processed foods filled with chemicals, sugar and fat; and I could go on forever about our ability to harm ourselves and other creatures . No wonder dementia and other diseases have increased significantly in modern times. We are the root cause, in my opinion.