All of the mentioned people are a part of ancient Greece
Leonidas- He was the king of Sparta, a city located in ancient Greece
Philip of Macedon- He was the king of Macedon (ancient Greece) who has its origin from the Argead dynasty
Alexander the Great- Also known as Alexander III he is a popular king known for his conquests around the world.
Cleisthenes- He is a Greek lawmaker who is known for creating the constitution of ancient Greece
Solon- A Greek lawmaker who is known for laying the foundation stone for Greek democracy
Demosthenes- An orator from ancient Greece. He is also known for his statesmanship
Wildly enough, may look back at the Cold War with fondness as it represented a time when the US knew who its enemies were. This is contrast to the state of warfare today where the US is fighting terrorist groups around the world.
it's also known as the Connecticut Compromise. this Compromise was an agreement when the large and small states could not come to a conclusion. the small states wanted equal representation in Congress while the larger states wanted it to be done by population. this Compromise was split Congress into two house. the Senate (for the smaller states) was equal representation each state got 2 senators. while the House of Representation (for the larger states) was represented by population.
The answer is Pan-Slavism