Your question is poorly worded. As written, there are no capitalized words in the sentence.
I believe you are asking which words need to be capitalized in the sentence.
Such words are highlighted below:
<u><em>T</em></u>he <u><em>F</em></u>ourteenth <em><u>A</u></em>mendment to the <em><u>C</u></em>onstitution made all races equal in their ranks of citizenship.
The relationship between "linguistics and power" is now widely recognized by most linguists. Strong institutions and citizens use language as a tool for building and maintaining their influence
