My knowledge may not be completely accurate, but I am almost certain the events go in this order:
Peloponnesian War
Julius Caeser takes power in Rome
Greeks develop democracy
Western Roman empire falls
Roman Laws are also referred to as Justinian Code.
The most popular monotheistic religions today are:
Sikhism, Christianity, Islam, Judaism, and Zoroastrianism
The most popular modern religions who believe in no gods (non theistic) are:
Buddhism, Jainism, and Hinduism