Lobotomy is a treatment that can make people more similar with the less intelligence humans. After the person loss some of the mental abilities, then she/he will be more cooperative with other humans. Some people have more advanced brains, so they have more mental problems.
Phineas Gage
Phineas Gage has been seen as the first lobotomized person in the history. He was a railroad worker, who got a steel rod trough his head in an accident. An explosion shoot the rod, but he survived from it. There was a high skilled doctor Edward H. Williams, who gave him first aid. [1]

”Mr. G. got up and vomited; the effort of vomiting pressed out about half a teacupful of the brain, which fell upon the floor.” [1]

Mental Health Care in Finland

”After World War II, corpses from surrendered areas were buried in the cemetery. The cemetery was first expanded in the early 1930s and the next time in the mid-1940s.” [8]
”The shock therapies in general had developed on the erroneous premise that epilepsy and schizophrenia rarely occurred in the same patient.” -Treatment Without Consent: Law, Psychiatry and the Treatment of Mentally Disordered People Since 1845 [10]
”Kraepelin, for example, saw as a symptom of early dementia that the patient required psychiatry to prove his authority to act as a psychiatrist and refused to say anything about himself.” -Expert in the Mental Health Care
Today
We have a neuroleptics, so there isn’t need for this kind of treatment. It’s called as a chemical lobotomy that destroys dopamine system. It effects via D2-reseptors, switch are response of keep dopamine system alive. When dopamine system decreases effect, then the person lost some of the motivation and change all the positive feelings to misery. [3]
REFERENCES
[1] VeryWellMind: Phineas Gage’s Astonishing Brain Injury[2] ResearchDigest: What the textbooks don’t tell you about psychology’s most famous case study
[3] Tuppu.fi: Society is sick
[4] Suzana Herculano-Houzel: Brains Evolution
[5] Tuppu.fi: Rat
[6] Kim Jong Un Looking at Things
[7] Wiki: Lobotomy
[8] Aikanaan: Pitkäniemi Hospital Cemetery
[9] Seura: Compulsory sterilizations were performed in Finland in 1935-70
[10] GoogleBooks: Treatment Without Consent
[11] ArchDaily: These Images of Abandoned Insane Asylums Show Architecture That Was Designed to Heal
[12] ScienceMuseum: A Victorian Mental Asylum