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The Undesirables: The Law that Locked Away a Generation

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Through the early twentieth century, the British Government locked away over 50,000 innocent people. Their ‘crimes’? Being poor and unyielding. This is their story.

'Staggering… Wise's book bristles with injustices.' Sunday Telegraph, *****

By 1950, an estimated 50,000 people had been deemed ‘defective’ by the British government and detained indefinitely under the 1913 Mental Deficiency Act. Their ‘crimes’ were women with children born out of wedlock; rebellious teenagers caught shoplifting; those with epilepsy, hearing impairments and chronic illnesses who had struggled in school; and many who were simply ‘different’.

Forcibly removed from their families and confined to a shadow world of specialist facilities in the countryside, they were hidden away and forgotten – out of sight, out of mind.

Through painstaking archival research, award-winning historian Sarah Wise shines a light on this shameful chapter. Piecing together the lives irrevocably changed by this devastating legislation, The Undesirables provides a compelling study of how early twentieth-century attitudes to class, gender and disability resulted in a nationwide scandal – and how they continue to shape social policy to this day.

'The heartrending stories Sarah Wise has unearthed beggar belief… beautifully researched and truly compelling.' Catherine Bailey, author of Black Diamonds

387 pages, Kindle Edition

Published April 4, 2024

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Sarah Wise

16 books6 followers

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Displaying 1 - 16 of 16 reviews
Profile Image for Amy Bookseller.
123 reviews18 followers
April 30, 2024
Why have I been putting myself through these types of books lately? The horrors that this book discusses are quite unbelievable. Young girls locked away for life as “mentally defective” due to having babies out of wedlock, kids who were a bit wayward or affected by a parents divorce, put away. And don’t get me started on the eugenics. Well researched and well written, some parts I found boring when it went into certain political policies etc, but that’s just me. I recommend for anyone who likes to read about social injustice, mental health, healthcare in past etc.
14 reviews
May 6, 2024
A hard read. Totally shocking and thought provoking. I will read more of her books.
Profile Image for Isabella O’Hara.
34 reviews
September 2, 2025
One of the best historical non-fictions I’ve ever read. Written with really gripping narrative rather than it just being a data dump.

This work feels important, largely because history books often fall short in unpacking the broader eugenics movements (with a disproportionate impact on women and girls) that perpetrated the globe in the decades leading up to Nazism.

I also really like when the author breaks the third wall in her writing - she often will emerge from third party narrative to speak directly to the reader about what is and is not in scope for her examination and share more candid opinions on certain topics. A nice touch to keep the reader engaged.
Profile Image for History Today.
253 reviews163 followers
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June 6, 2024
In 1919 ‘Bessie B.’, aged 24, was committed to Abingdon Workhouse, known locally as ‘the Grubber’, under the Mental Deficiency Act (MDA) of 1913. She was unmarried, had given birth to four children each with a different father, had syphilis and appeared to be destitute even though she had earned her own living without needing to fall back on Poor Relief. While Bessie showed no signs of mental deficiency, she was certified as a ‘moral imbecile’. Doubts were cast on whether or not she should be detained simply because of her ‘bad character’, but the workhouse medical officer believed that it would be ‘in her own interest’ in order to treat her syphilis. She left the institution five years later, one of the ‘lucky’ few to have got out.

Bessie B. was among the tens of thousands of children and young adults who were labelled ‘idiots’, ‘imbeciles’, ‘feeble minded’ or ‘moral imbeciles’ and forcibly confined in institutions when the MDA came into force on 1 April 1914. The practice of sequestering away young women and men for social and moral infractions such as getting pregnant out of wedlock, petty thieving, vandalism, persistent drunkenness and vagrancy has always been known about, but historians have struggled to ascertain the full extent to which it took place mainly because many records were lost, destroyed or closed under a 100-year rule to protect patient confidentiality.

The social historian Sarah Wise faced these obstacles too. Yet in her work to expose the shocking consequences of the MDA, particularly as it was applied to those who were identified as ‘feeble-minded’ or ‘moral imbeciles’, she has dug deep into the archives to show how a single act of Parliament wrecked tens of thousands of lives in the first half of the 20th century. The Undesirables is as compelling as it is shocking, advancing our knowledge of this shameful episode in leaps and bounds.

Read the rest of the review at HistoryToday.com.

Louise Hide
is a Wellcome Trust Fellow in Medical Humanities and an Honorary Senior Research Fellow at Birkbeck, University of London.
44 reviews
March 30, 2025
Wish this had been taught in history class.

Very interesting book: definitely want to look into this further. I feel like the last section (on our era) could have been more detailed, though. I think it would really drive the point home that these things don't just have a clear cut-off point.

I'd also hoped there would be more in-depth case studies, but as mentioned in the book, I think there weren't because it was so hard to piece it together. Truly depressing that that is the case - how many people's lives have just been washed away by this law?
This entire review has been hidden because of spoilers.
Profile Image for Mary.
2,176 reviews
July 21, 2024
An interesting read but somehow not what I expected. There was just too much boring detail about the laws enacted. I suppose I'd have preferred more personal stories. It was awful that people were locked away, sometimes for their whole life, for simply having had a difficult childhood, an illegitimate child or learning difficulties.
28 reviews
April 20, 2024
This book details a history of UK government treatment of people judged to be subnormal or 'difficult' (including unwed mothers) starting with the eugenics movement and continuing to the present day. The same can be chronicled elsewhere, including in the USA. Sad and harrowing.
Profile Image for Jasmin.
Author 1 book12 followers
December 30, 2025
My grandmother worked as a mental health nurse in the 1970s and 1980s, and she told me about a patient who had been locked up since the 1920s. What was the act that had 'justified' her freedom being ripped away? She called a man an 'offensive' name. When I heard this story many years ago, I thought that there must have been more to her confinment than that, but Sarah Wise's The Undesirables shows that there very likely wasn't. Simply being forthright, especially as a woman, was enough to get a person detained under the 1913 Mental Deficiency Act.

The Undesirables is an unflinching and heartbreaking study of the act that locked thousands of people away in the early to mid 20th century. It delves into the ways in which attitudes towards gender, class, and disability resulted in people being removed from their families and society and imprisoned in so-called 'specialist facilities'.
Profile Image for Shalini.
434 reviews
January 12, 2025
Social history is an important area for reflection around medical practice, and this book about the practice of locking away the undesirables in Britain in recent times (1913- 1959) offers much food for thought. This appalling practice was done in the name of science, led by the eugenics movement and in a large part led by women to address victimisation of women and social purity. The practice of conjuring up panic where previously there was a concern is a tactic that continues today. While psychologists and educationists played a part, the domination by and blind faith in doctors had a big part. This book will hopefully teach those in power, humility. The last chapter delves into areas where deprivation of liberty continues today, social justice is not yet in sight.
Profile Image for Michi.
564 reviews4 followers
March 10, 2025
A fascinating and profoundly unsettling look into a dark chapter of history that isn't as far behind us as one might hope. I learned a lot but ultimately felt that, particularly the introductory chapters, while obviously required to provide context, could have been somewhat briefer, with more focus given to the stories of individual people who suffered under this system.
Profile Image for HattieB.
447 reviews3 followers
October 21, 2025
A fascinating read that got me pondering how society has treated those with mental health struggles. This was a brilliant, heartbreaking and thought provoking book where those it has written about should never be forgotten.
Profile Image for Alexandra Kelly.
96 reviews
December 22, 2025
I'm surprised I haven't seen this be talked about more, because I found it to be excellent, and with a lot of relevance. It's very well researched, and does a great job exploring both the wider political and social context, as well as the nitty gritty details and individual stories.
Profile Image for Victoria Gray.
16 reviews
February 21, 2025
A lot of information

It’s a good book especially if you are looking for information but found it more like a textbook for university rather than a relaxing read
Profile Image for Sarah.
215 reviews
September 24, 2024
Can’t read in one sitting as it’s just so sad what happened in the past. Thank goodness we’re not all locked up today.
Displaying 1 - 16 of 16 reviews

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