Why is it important for a person to know the first amendment?

Cause it the right for freedom of speech freedom of press freedom of religious. It help mostly in court cases

So people know their rights of freedom of speech, press, religion, and assembly. 
hope I helped

It developed as a reaction to the impact of european colonialism in africa on peoples of african descent. in the  mid-20th century, activists in africa adopted pan-africanism as a rallying cry for independence from colonial rule. some african pan-africanists sought to unite the continent as one independenthope it was useful