Despite government reforms under Solon around,
there was still unrest.

594 B.C

Explanation:

Solon was an Athenian lawmaker, poet and statesman born in 630 BC, in Athens. He's famously known to have created great reforms in the Athenian democracy against economic, political and moral decline among the people.

In Athens, the form of government transited from monarchy (where a hereditary ruler has a central power) to aristocracy (rulership by landholding elite), but the ordinary citizens still had discontent. Despite government reforms under Solon around 594 B.C, there was still unrest. As a result, it led to an increase in the number of people who gained power by force or tyrants.

Subsequently, Athens embraced democracy which is a government of the people, by the people and for the people.

b.

jim crow laws were enacted in northern states.