Were scientists from the past worried about this when they worked to improve medicines and public health that has increased the global average lifespan from 31

Were scientists from the past worried about this when they worked to improve medicines and public health that has increased the global average lifespan from 31 years to 70 years in the past century? No one knows the answers to your questions, but I think there will be solutions to those problems. Birth rates are averaging out and hopefully starting to go down. Automation of work is going up. The reach of education has increased. Also even if everyone was immune to death by aging, some actuaries showed that humans will still be limited to 400 years due to accidental death. I think that people in different parts of the world today have life spans that are 1/2 to 1/3rd of other countries. Maybe if we're not losing all our most experienced and knowledgeable people to senility, old age, and death, we may come up with solutions more quickly.