The article suggests that human nature, the pursuit of longevity by billionaires, and even Donald Trump's policies offer reasons for optimism about the modern world. Billionaires are investing heavily in medical research, including cures for aging and diseases like Alzheimer's, potentially benefiting everyone. The author posits that these efforts, driven by a desire to extend life, could lead to significant advancements in health and well-being, making the world more liveable.