A relative humidity level between 40% and 50% is generally considered to be the most comfortable. Anywhere from 30% to 60% is acceptable, but ideally you want to avoid the extremes of that range.
Ancient Greek civilization began around 1600 BC, at Mycenae and in Crete. It ended with the annexation of Greece by Rome in 146 BC. It was at its height around 431 BC, when the Peloponnesian War between Sparta and Athens began.
The ancient Greek economy is somewhat of an enigma. Given the remoteness of ancient Greek civilization, the evidence is minimal and difficulties of interpretation abound. Ancient Greek civilization flourished from around 776 to 30 B.C. in what are called the Archaic (776-480), Classical (480-323), and Hellenistic (323-30) periods. During this time, Greek civilization was very different from our own in a variety of ways.