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--- videos:geopolitics [2025/06/19 05:51] – jhagstrand
+++ videos:geopolitics [2026/05/31 02:11] (current) – [demographics] jhagstrand
@@ Line 145: / Line 145: @@
 observer at the center
-horizon, a plane 5 km in diameter tangential to the observer
+  * horizon, a plane 5 km in diameter tangential to the observer
-zenith - directly over the observer's head
+  * zenith - directly over the observer's head
-celestial meridian - the circle describing the plane containing the observer, the zenith, and North
+  * celestial meridian - the circle describing the plane containing the observer, the zenith, and North
+Projections chronological
+  * Orthographic
+  * Equirectangular
+  * 1100 Azimuthal Equidistant
+  * 1569 Mercator
+  * 1772 Lambert Azimuthal equal-area
+  * 1805 Albers equal-area conic
+  * 1885 Gall-Peters
+  * 1889 Aitoff
+  * 1898 Van der Grinten
+  * 1963 Robinson
+  * 1921 Winkel Tripel
+  * 1923 Goode Homolosine
+  * 1954 Fuller Dymaxian Polyhedron
+  * 1996 Waterman Butterfly
+projection sequence
+  * Equirectangular
+  * Mercator
+  * Aitoff
+  * Fuller
+wall chart - the whole globe on one page
+  * centered on Prime Meridian
+  * centered on Anti Meridian
+  * centered on a pole
+  * add an orthographic with 4 hemispheres
 ===== geosketch cheatsheet =====
@@ Line 241: / Line 270: @@
 If you’d like, I can dive deeper into specific aspects, like the paleoceanographic evidence, the role of the Scotia Plate, or the climatic impacts of the ACC. Alternatively, I could generate a visual representation of the tectonic movements or the ACC’s path—let me know if you want me to confirm for image generation!
+===== demographics =====
+<code>
+I am beginning to see a correlation between population and population density and the size of a landmass upon the development of the culture.
+I am aware of the history of empires, but also of cultures as they move and spread across the land masses of the planet.
+Size of land mass
+Life cycle of culture
+Timing and maximum size
+And technology development
+Population density
+For each population explosion
+When did the culture arrive
+How did the culture's differentiate originally
+I am wondering if there is a field of study that encompasses all this.
+China's population is peaking now. India's population is due to explode soon up to maybe 5 million. And after that Africa's population is due to explode to maybe 50 million.   (this is false per gemini)
+search youtube: microbial competition time lapse bread
+</code>
+https://gemini.google.com/app/ae1ab087615e4312
+Yes, absolutely. If you want to dive deeper into this specific intersection of population, history, technology, and long-term societal shifts, you are looking at a few overlapping academic fields.
+Depending on which angle of this conversation fascinated you the most, the official academic fields are:
+---
+===== 1. Demography (and Historical Demography) =====
+This is the literal study of human populations—their size, structure, distribution, and how they change over time due to births, deaths, aging, and migration.
+  * **What they study:** If you are interested in the mathematical models of how Africa will triple in size while China halves, or how female literacy directly drops birth rates, that is **Demography**.
+  * **Historical Demography** specifically looks backward, using church records, ancient tax data, and archeology to reconstruct the population collapses of the Dark Ages or the boom of the Industrial Revolution.
+===== 2. Macrohistory (or Cliodynamics) =====
+If you are fascinated by the sweeping, centuries-long patterns of how human societies rise, peak, crash, and adapt, you are looking at ////Macrohistory////.
+A cutting-edge, highly mathematical subfield of this is called ////Cliodynamics//// (named after Clio, the Greek muse of history).
+  * **What they study:** Cliodynamicists treat history like a hard science. They use mathematical modeling and massive historical databases to find the long-term cycles of human history. They look at how population growth creates economic pressure, how technology changes societal capacity, and what triggers the collapse of civilizations.
+===== 3. Human Geography / Population Geography =====
+While history looks at these trends across time, ////Human Geography//// looks at them across //space//.
+  * **What they study:** This field studies how human populations interact with their physical environments, urbanization patterns, migration routes, and how regional identities (like Sub-Saharan Africa vs. North Africa) dictate economic and demographic behavior.
+===== 4. Development Economics =====
+If you want to look at the exact mechanics of how a country transitions from a poor, agrarian society into an educated, technological powerhouse, this is the field.
+  * **What they study:** Development economists map out the "Demographic Dividend"—the window of time when a country's birth rates drop, leaving them with a massive workforce and very few dependents, which usually triggers an economic and technological explosion.
+---
+==== If you want to read more... ====
+If you want to look up foundational texts or thinkers in this area, search for terms like ////"The Demographic Transition Model"//// (the formalized theory of the birth/death rate flip) or the works of authors who bridge these fields, like ////Vaclav Smil//// (who writes deeply about the interplay of energy, population, and technology) or ////Peter Turchin//// (one of the founders of Cliodynamics).
+Which of these angles do you find most compelling—the hard data of population mapping, or the grand, cyclical theories of history and collapse?