A book containing 5 essays:
1) The Three Dimensions of Public Choice
2) Vernacular Values
3) The War Against Subsistence
4) Research by People
5) Shadow Work
While this book is not a substitution for his more complete works, it deals with a lot of practical information. If you can get your hands on anything by Ivan Illich, read it.
While I can't explore everything Illich gets into, I'll do my best to pull out a few valuable threads. Fundamentally, Illich challenges the Western idea of 'development'. He states:
"Up to now economic development has always meant that people, instead of doing something, are instead enabled to buy it."
He argues that this has led to an unprecedented situation. Instead of being primarily occupied with subsistence, individuals are primarily occupied with wage earning and it's inescapable complement, shadow work. Shadow work "comprises most housework women do in their homes and apartments, the activities connected with shopping, most of the homework of students cramming for exams, the toil expended commuting to and from the job. It includes the stress of forced consumption, the tedious and regimented surrender to therapists, compliance with bureaucrats, the preparation for work to which one is compelled, and many of the activities usually labeled 'family life'."
As I understand it, shadow work is everything we must do to maintain social standing in a wage oriented society. Crucially, shadow work is not optional, it is compulsory, and it is un-paid. However, not all un-paid work is compulsory shadow work. Subsistence is the opposite of wage/shadow labor.
Furthermore, we may even pay to do our own shadow work. This is most obvious in the case of university education. As Illich points out: "Modern enclosure, apartheid, is never just cruel or just degrading, it has always a demonic dimension. Prose cannot do justice to a social organization set up to enlist people in their own destruction."
Indeed, "The creation of professionally supervised shadow work has become society's major business."
If you want more of this, Illich expands on specific sectors of this 'professional supervisor' economy in Deschooling Society and Limits to Medicine.
This wage/shadow labor situation sets up a society of scarcity, where: "...people who live on wages have no subsistent households, are deprived of the means to provide for their subsistence and feel impotent to offer any subsistence to others."
I can think of no better description of the feeling of scarcity among 'plenty' in modern consumerist society. There is indeed plenty, but our ability to reach it as wage-earners is always precarious.
How did this wage/shadow labor come about? Illich traces it back to a push to control vernacular speech. As he puts it: "The switch from the vernacular to an officially taught mother tongue is perhaps the most significant - and therefore, least researched - event in the coming of a commodity-intensive society."
In medieval Spain, the Queen was advised by a certain Nebrija to control the language of her subjects, or else be consigned to the historical dust-bin. He envisioned a society where state control was extended to the realm of speech. It's difficult for me now to grasp the significance of this idea, as it was for the Queen, who rejected his proposal as an over-extension of her queenly powers. It took another 150 years to catch on. What does Illich mean, though, by vernacular vs. taught speech?
"Vernacular [speech] spreads by practical use; it is learned from people who mean what they say and who say what they mean to the person they address in the context of everyday life (...) Taught colloquial is the dead, impersonal rhetoric of people paid to declaim with phony conviction texts composed by others, who themselves are usually paid only for designing the text."
Ultimately, this represents a medieval attempt to control the population, which has only flowered in recent times: "From a science with attempts to control external nature, the new R&D has shifted toward the search for means which permit the subtle but effective imposition of self-control on people."
Instead of forcing people to do their employer's bidding, it's cheaper to train them to do it without coercion. For more on this, see the 'burnout subject' of Byung-Chul Han.
Finally, there are some useful concepts in here for anyone hoping to create a future without wage/shadow exploitation.
First, Illich draws attention to a useful definition of science: "Hugh [of St. Victor] defined mechanical science as that part of philosophy which studies remedies for bodily weakness, when such weakness derives from humanly-caused disruptions in the environment - science, then, is a corrective for an ecological disorder."
We are certainly living in vast ecological disorder.
Next, Illich briefly mentions that: "Bicycle traffic in cities permits one to move four times as fast as on foot for one-fourth of the energy expended - while cars, for the same progress, need 150 times as many calories per passenger mile."
This is the only argument for bicycles supplanting cars that I need to hear.
And finally, Illich makes it clear that subsistence today does not necessarily mean the grinding subsistence of previous centuries:
"...modern tools make it possible to subsist on activities which permit a variety of evolving life styles, and relieve much of the drudgery of old time subsistence."
There's a lot to unpack here, but it is worth the trouble to dwell on and mentally compost these ideas. There's a lot of useful insights to be had.