The quoted tweeted study shows that places that lost more young men in WW1 became less innovative.
One can add that the type of people lost in WW1 often were above average in their human capital. People disproportionately lost were the aristocracy, officers, students from upper-class schools:
"Eton School alone lost 1,157 former pupils – 20.5% of those who served. Harrow, lost 644 scholars (22% of those who served); Wellington School, lost 707 pupils (20%); Winchester, lost 505 former boys (21%); King Edward Birmingham, 246 men (18%); Felstead School, 244 (19%); Downside School, 109 men (21%) to name just a few. These were Britain’s future leaders, destined for great things, cut down in their prime.
The British Aristocracy was devastated by the war, with 47 Peers killed and six of these, leaving no brothers to succeed them. In all, 264 Members of Parliament served in WW1 and 22 MP’s were killed. 323 Members of the House of Lords served and 24 Peers died in the war. The UK wartime Prime Minister Herbert Asquith lost a son, while future Prime Minister Andrew Bonar Law lost two sons. Anthony Eden lost two brothers, another brother of his was terribly wounded, and an uncle was captured.
Commercial and Professional also suffered. Nearly 15,000 Solicitors, or a quarter of all practitioners, served in the First World War. Of those, 588 were killed and 669 seriously wounded (nearly a tenth of all practitioners at the time). Similarly, 1,625 Chartered Accountants and 1,803 articled clerks served during the war, and 510 were killed. 1,300 British Architects served in the war and 230 Fellows, Associates and students died in the war. The Institute of Electrical Engineers war memorial lists 162 Members killed, the Chemical Society, 30 members. Similarly many Doctors, Teachers, and others from all walks of life which showed great promise, were lost in the war...
Great Britain lost 51 Olympians, 79 International Rugby Players, 275 First Class Cricketers, including ten Test Match Players, and 42 Oxbridge boat race rowers, also killed in the war. Captain, Tony Wilding, Royal Marines, the nine times Wimbledon Tennis Champion and considered the world’s first Tennis Superstar, died at Auber Ridge, 9th May 1915, aged 31."
The effects of Tennis on French history. Multiple French monarchs died during Tennis matches.
Also:
"at the suggestion of a certain Dr Joseph Ignace Guillotin — whose name would later be famous in another connection — they moved to the jeu de paume, the large indoor tennis court nearby"
"Yet again tennis plays a significant part in French History"
Under the Qing dynasty, China experienced a massive expansion in population, growing from 50-150 million persons in the Ming Era to around 400 million by the mid 19th century.
The main reasons for this extraordinary expansion🧵
Was first its military expansion, by 1760, the Qing, under the "Ten Great Campaigns of conquest," had incorporated a massive amount of new land.
In the following decades, a mass movement of Han people into this new farmland significantly expanded agricultural production.
Between the late medieval era and 1800, literacy rates in Britain increased from 5% to over 60%.
This happened despite virtually no state investment in Education in a bottom-up process motivated by individual interest in acquiring literacy and Protestant religious zeal in spreading it.
Before the mass establishment of a public education system, the average male during the early industrial revolution had, on average, 1 year of schooling.
As far as higher learning, there were more men with a university degree in late medieval England than in early industrial-era England.
Mining first started in the 4th millennium BC and suffered major disruptions toward the end of Old Europe around 3000 BC and in the late Bronze Age with the collapse of Mycenaean civilization.
Unable to defend itself from Umayyad incursions, the independent Duchy of Aquitaine surrendered to Charles Martel, who turned back the Umayyad at the Battle of Tours.
Aquitaine was worth to the Franks much more than the sum of its people; it contained valuable silver mines, in particular the Melle mines, which became the most productive source of silver in the Carolingian empire.
Isotope analysis of Carolingian coins shows that before the 750s, most of the silver in coinage came from recycled Byzantine silver, while afterwards most came from Frankish mines, with Melle supplying the largest share.
The mining work has created a network of over twenty kilometers of tunnels.
Melle silver is characterized by low gold content, while the opposite is true for Byzantine silver. Isotope analysis of north-west European coinage shows a decline of gold content in silver coinage, indicating a transition from Byzantine to Melle silver.
"A single mass killing of more than 140 children and over 200 camelids directed by the Chimú state, c. AD 1450."
Cuts transecting the child's sternum and displaced ribs suggests that "the chest had been cut open, perhaps to extract the heart." For most skeletons "No other evidence of perimortem trauma was observed" indicating the extraction of the heart was done on live victims.
As Spanish chronicler Cristóbal de Molina described "children had their live hearts taken out, and so the priests offered the beating hearts to the huacas to which the sacrifice was made."
Children were brought from across the region to be sacrificed next to the Chimú capital.
"Variability in forms of cranial modification and stable isotope analysis of carbon and nitrogen suggest that the children were a heterogeneous sample drawn from multiple regions and ethnic groups throughout the Chimú state."
The sacrifice coincided with a major weather event, heavy rains and flooding carried a layer of mud on top of the burials in their aftermate, "it is tempting to hypothesize that the two wventa are associated"