All 3 Uses of

advocate

in

Up From Slavery: An Autobiography

... I explained that my theory of education for the Negro would not, for example, confine him for all time to farm life ... but that, if he succeeded in this line of industry, he could lay the foundations upon which his children and grand-children could grow to higher and more important things in life. Such, in brief, were some of the views I advocated in this first address dealing with the broad question of the relations of the two races, and since that time I have not found any reason for changing my views on any important point.
Chpt 13 *

advocated = publicly supported (argued for)

In my early life I used to cherish a feeling of ill will toward any one who spoke in bitter terms against the Negro, or who advocated measures that tended to oppress the black man or take from him opportunities for growth in the most complete manner.†
Chpt 13

advocated = recommended or publicly supported

Now, whenever I hear any one advocating measures that are meant to curtail the development of another, I pity the individual who would do this.†
Chpt 13

advocating = recommending or publicly supporting

Definitions:

(1) (advocate as in: to advocate)
to recommend or publicly support (someone or something)
(2) (advocate as in: an advocate supporting)
a person who publicly supports and works to advance a cause

or more rarely:

someone acting in the role of a defense lawyer in England's past and in some jurisdictions today
(3) (advocate as in: an advocate in court)
a lawyer or officer of the court in some jurisdictions in Europe, colonial America, and the military
(4) (devil's advocate as in: I'll play the devil's advocate)
a person who takes an unpopular position to encourage debate or test ideas
(5) (meaning too rare to warrant focus)