How effective was the 15th amendment in the late 1800s to early 1900s

After the Civil War, during the period known as Reconstruction (1865–77), the amendment was successful in encouraging African Americans to vote. ... Many African Americans were even elected to public office during the 1880s in the states that formerly had constituted the Confederate States of America.

Explanation:

the language of nature was a manifestation from god as he said "let there be light" and there was light the world began to assume visible, comprehensible form.

what ever we know now think of the old vision of creation we can be sure that with out the speaking of word -without language- we would have no science today with its striking power to illuminate the world.