Conversation so far:
Was Havelock Ellis for or against sterilization?
Havelock Ellis was strongly opposed to the idea of castration for eugenic purposes.
Did Havelock Ellis have another motion in mind besides castration for eugenic purposes?
Ellis was witness to the rise of vasectomies and ligatures of the Fallopian tubes, which performed the same sterilization without removing the whole organ. In these cases, Ellis was favourable.
Why did Havelock Ellis believe vasectomies and ligatures of the fallopian tubes more favourable for sterilization?
Ellis hypothesized that if an already mentally unfit man is forced to undergo sterilization, he would only become more ill-balanced, and would end up committing more anti-social acts.
Were there any controversy on Havelock Ellis views on the forcement of sterlization?
Are there any other interesting aspects about Havelock Ellis and his views on sterilization besides opposing it for other means?
Havelock Ellis supported adding ideas about eugenics and birth control to the education system in order to restructure society, and to promote social hygiene.
What form of birth control did Havelock Ellis support adding?

Question: How was one deemed unfit?
Self-contained rewrite: How was one deemed unfit for sterlization according to Havelock Ellis?