When someone wrote something down 500 years ago, just the act of writing means they were educated and there is some value in their perspective. In the age we live in, there is information overload for a historian to pick through. How will historians know how to sift through all of the noise?

The cultural standards by which a woman's weight and shape have determined her sexiness have changed dramatically over time in Western/European societies. For example large, curvy "rubenesque" women were deemed sexy for much of the 17th and 18th centuries whereas today, thinness is praised > curves.

I'm wondering if the (subjective) attractiveness of a man's physique has similarly fluctuated? In what ways?

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It's fairly small, close to the empire's heartlands, and was one of the empire's first colonies. How'd it gain independence so easily, and so early on compared to many of the other colonies?

Was it just some person had a good idea once? Or was there a cultural shift or something that caused it to emerge?

Or was there something going on like the American Revolution inspiring the French? Did the news reach the Etruscan-led Romes and maybe inspire them to revolt, or vice-versa for Cleisthenes and Cleomenes?

I have to do a research paper for school which counts 15% of my history mark but I'm having trouble finding sources and I need to have quite a few

I'm trying to find information about other concentration camps that may have existed throughout history. Of course, everything in google is just the Holocaust. Is this really the only example? What about the Gulags of U.S.S.R.?

Title says it all. Why was there much more hostility and xenophobia towards Christianity in these countries compared to another "foreign" religion like Buddhism?

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I've read that Nero's Golden House (the Domus Aurea) was buried and built over by successive structures, such as the Baths of Trajan. I'm familiar with archeological tells, and as I understand it, it's not unusual to have sites built up over the course of time. However, only a few decades separated Nero and Trajan. Why was the magnificent palace so quickly buried and built over?

I know the Mongols weren't the only ones and that steppe hordes had harrassed settled communities in Europe, the Middle East and China for thousands of year. But somewhere around 1800-1600, it seems these kingdoms/empires faded out of history. What was the reason for this? Was it the sheer manpower and organization advantage of nations at the time, or was it a specific tactical advancement that caused their decline?

Also, how did these hordes evolve with time? How different were the Huns, Parthians, Mongols, Manchus etc. from each other? Thank you :)