We need to produce HTML body content (no wrappers) with h3/h4/p/ul/ol/strong/em tags only. Must be 1500-2500 words, which is quite long (~10-12 paragraphs). Must include intro, at least 4-5 subheading sections. Use bold, lists etc. Provide specific numbers, ranges, references to historical sources, classic texts, modern research. At end, after content, use separator