Thank the gods for Novocaine!
For me one of the best improvements over the last century has been the great increase in life expectancy. In the nineteenth century you could expect a life of say 18 years as a youngster and 30 or so years as an adult if you were lucky-- and didn't get consumption or some other incurable ailment. Today most people in the western world reach 65 and if you do there is also a statistical likelihood that you will reach your late seventies or eighties which is now the average age for death.
That means that we have doubled our adult life span since 1914, i.e.18+60 years. Longevity is by no means the only improvement, the quality of life has vastly altered much of it through improvements in medicine and technology. Not forgetting the dramatic drop in numbers of death by infectious diseases, child mortality rates dropping, education becoming universal, number of deaths from wars and murder also having declined and extreme poverty now speedily being eradicated worldwide.
OK its not paradise, there is a dark shadow on the horizon namely by threats from Muslim fanatics who sacrifice themselves for their Islamic theocracy and refuse to see life from a human perspective.
Overall, it has to be reckoned that the world is nevertheless a far happier and healthier and a more equitable place than in the past and JW curmudgeons have their twisted "theocratic" reasons why they refuse to recognise it.