A view of changes over the past century.
Anyone in their eighties will have lived through and witnessed a number of social, political and economic changes, some major like WW2, the depression years in Europe and North America, and technological changes especially in areas of communications, transportation and nuclear energy.
Here I take a snapshot of how some things were in the first decades of my life and how they are now by focusing on a few selected areas of interest to me and I expect to some others. Steven Pinker in Enlightenment Now is one author who gives a more scholarly treatment of these topics in his discussion of human progress.
Population
Starting with people, there are estimates of the world population, which remained about one billion for centuries, until it started to grow around 1850 reaching almost eight billion today. In my lifetime the increase has been about five billion. In Canada the population has more than doubled from 15 million in the 1950s to 39 million today with very little discussion about what the target is, except regarding annual immigration numbers and intake of refugees.
Countries
While the size of planet earth has remained the same, the number of countries which claim sovereignty over it has increased markedly to around 200 ranging in land area from Singapore and Malta to Russia and China. Not surprisingly the governments of individual nations are affected by the actions of other nations especially as transportation and communications technology bring people together. Many areas for cooperation and conflict have experienced significant growth over the past century. Flows of migrants and refugees have increased markedly, and we know much more about them due to press reporting and communications technology such as the use of cellphones.
The universe
My upbringing included being taught about the creation of the world and mankind as set out in the Book of Genesis. Other religions have their explanations. Yet to take a strong hold were the 1840s teachings of Darwin and theories of evolution. For at least the first 14 years of my life I was shackled to this biblical interpretation of how the world and its inhabitants came into existence. Today, I can follow the lively debate on You Tube between biblical believers such as the Archbishop of Canterbury and those like Christopher Hitchens and Richard Dawkins who adhere to the findings of modern science about the nature of evolution. My understanding of this issue has changed in my lifetime from God created the world and human beings to human evolution by natural selection as pioneered by Darwin.
Transportation
In the 1930s domestic travel was by foot, bicycle, horse and cart and by some cars and trucks. Railways and steamships provided domestic and international transportation while air travel was in its infancy. It took six days to fly from England to India or Cape Town because of the need to refuel on the way. Today people fly from Asia to Europe for a long weekend. Maritime freight transportation involves gigantic freighters loaded with metal containers which are one of the most significant developments in international trade. Another is the substitution of communications for the order and delivery of goods. I can get my books, newspapers, and recorded music online instead of buying the physical items which carry the content.
A contrast with the past
An example of the difference between today and the 1930s and 40s is the western world view of Germany and Japan. During WW2 both countries were seen as vicious and cruel enemies, organizing concentration camps and death marches for military prisoners and civilians. Today both are considered as democracies respecting recognition of universal human rights. I am not sure when this change took place, but it was a number of postwar years before occupation of the two countries ended.
May 8th 1945 is the day Nazi Germany surrendered to the allies. Today in some German publications it is reported as liberation from the evils of Nazism and a time for Germans to rejoice.
“Yet (this) liberation framing is somewhat contentious — because it is unhistorical. Most Germans who experienced May 8, 1945, did not view the Allies as liberators. Nor, for that matter, did Western forces view themselves as such. “Germany will not be occupied for the purpose of liberation but as a defeated enemy nation,” read the directive issued to the commander of American forces that April.” (NYT May 8, 2021).
My conclusion is that it is extraordinarily difficult to predict major societal changes even ten years in the future. Remarkable changes have taken place in my lifetime. The same will probably occur over the next decades.