Why was it so important for laws to be written in ancient Rome?

plebeians protested the unfairness of rome's unwritten laws

Explanation:

the struggle between the plebeians and the particians effected the government by the ideas on how people could govern themselves.

the answer to your question is:

strong-mayor system

abraham lincoln  (february 12, 1809  – april 15, 1865) was an american statesman, politician, and lawyer who served as the 16th  president of the united states  from 1861 until  his assassination  in april 1865. lincoln led the nation through the  american civil war, its bloodiest war and its greatest moral, constitutional, and political crisis.[2][3]  he preserved the  union,  abolished slavery, strengthened the  federal government, and modernized  the u.s. economy.