Answer:
1: 30%
2: (this is probably said in the end of the video you must have watched)
3: transitional zone
4: (must be in the video you watched)
Explanation:
I would say that the best way to say it is that it is most concerned with the human: human rationality and search for pleasure and fulfillment, the way humans experience and find earthy pleasures and with the human psyche.
Fall of Constantinople, (May 29, 1453), conquest of Constantinople by Sultan Mehmed II of the Ottoman Empire. The fall of the city removed what was once a powerful defense for Christian Europe against Muslim invasion, allowing for uninterrupted Ottoman expansion into eastern Europe.
The Red Scare which was basically another Cold War threat although it never fully escalated.