The four main causes were: militarism, alliances, imperialism and nationalism - or as an acronym, M-A-I-N (this made it much easier for me to remember the causes)
Answer:
approximately 4,000 years ago
Explanation:
The Mycenaeans lived mostly on mainland Greece and were the first people to speak the Greek language. The Minoans built a large civilization on the island of Crete that flourished from around 2600 BC to 1400 BC.