This is a book about the development of the "home" on a historical level. More than this, it examines the nature of a home from outside of simply an industrialized form by looking at it from the perspective of "comfort", the definition of which forms Rybczynski's essential thesis. If home is primarily about "comfort", then how do we define comfort in light of history and its present function and understanding (which the author would insist hasn't changed much).
What Rybczynski ultimately hopes to show in this journey of the home from the Medieval ages to present, is that while the understanding of comfort has changed in time, the fundamental idea and pursuit of comfort has essentially stayed the same. So while we might look back on foreign cultures and see something archaic and unsettled from modern Western eyes, this is in fact not necessarily the case. As the final pages argue, comfort and home have a layered understanding and definition that do not allow us to simply transfer one idea of comfort to another. Instead, comfort (and thus the idea of home) is formative, adaptive, cultural, functional, traditional, and symbolic according to place and time. It is through understanding the nature of how our own place and time has gained its influence that we can thus gain perspective on what guides our own unique understanding of comfort and home.
The history is fascinating, and within it we do find something of a forward trajectory, even if this trajectory occurs in differing degrees and in different directions (sometimes at the same time). One such trajectory is the shift from public to private, and as well from free formed public places to the privately domesticated. The book gives a lot of attention to the public/private evolution, primarily in the idea of the Bourgeois (free governed towns/cities that stood within a larger feudal and rural territory), which in Europe represents for us the closest concept of an actual home. Alongside this is the history of the chair, which was handed down from the earlier Greeks and essentially disappears in Medieval England (Rybczynski attempts to suggest that this was because of the sheer complexity and challenge of turning a chair in to a form of comfort, something that likely deterred competent societies from abandoning their floor sitting ways). Equally parallel is a side trip to Holland and the Netherlands to examine the Dutch as likely some of the first to truly influence the development of the modern home towards the private sphere (specifically in how it adjusted to the idea of the "family"). Beyond this, the home had essentially been a public unit in which the role of the family was less than defined in areas that were shared by workers, relatives, servants and friends (given that beds were shared by all, baths were shared by all, and that there was little to no separation between living and working quarters, the development of relationships between parent and child and even husband and wife, was somewhat limited in comparison to what we know today. The village raised a family, and your family was your village in many ways).
Comfort in the Medieval period (and post-medieval) was also layered around the more complicated nature of symbolism (religious and cultural) and form rather than pure function. A chair, for example, became the symbol of the elite, and in this period abandoned the Greek notions of comfort for a largely erect and stiff form. If one belonged in a chair then they must sit up straight. It would not be until the ideas of domestication and privacy emerged (or re-emerged in the developing world) that the understanding of comfort with shift once again. The religious monastaries were the cleanest living quarters (as they were also the ones that drove societies general progress in this day and age), and in general, the more developed the notion of a home was, the more likely the home was to become a place of sanitation and domestication. As one follows this development on a historical level, it was usually the home that would be cleaned and prioritized before the people (with, as the book suggests, kitchens becoming temples, and paintings and furniture becoming symbolic accessories). As families became more distinct (something that the growing idea of the private home allowed for), so did the comforts that came with cleanliness of that person as well (which coincided with the growing idea of separated rooms and functional houses, the bath which was likely one of the last rooms to be developed).
Rybczynski also has some interesting things to say about how we develop our traditions, specifically surrounding the idea of the home. In the opening pages he helps us to understand our own Colonial history by recognizing the the comfort and romanticism of Colonial design (to our eyes) was birthed out of an invented tradition to separate those who came from a celebrated past and the growing number of immigrants that began to settle around them. The designs that we find tend to romanticize a past in a way that does not necessarily reflect the actual history. They simply breathe comfort from an invented tradition that provided a form of "comfort" in a changing environment. And according to Rybczynski, we do this all the time (indeed, many of the ways that we develop the nature of a "home", and the ways that we understand "comfort" are interconnected with a confusion of history and constructed tradition.
And yet home is what we make it. The book notes a crossroads in the invention of gas lamps (and eventually heating systems) as a moment where the tension between the production of a home on an industrialized level, and the making of a home on a human level came to the forefront. This tension remains, and in truth, technology does not always (or rarely ever) makes a home meaningful. And meaning is often what breeds comfort above all else. We don't always understand or know what makes us comfortable, we simply know that we are, and in those moments we often know we are "at" home where we are.