The private sphere is the complement or opposite to the public sphere. The private sphere is a certain sector of societal life in which an individual enjoys a degree of authority, unhampered by interventions from governmental or other institutions. Examples of the private sphere are family and home.
In public-sphere theory, on the bourgeois model, the private sphere is that domain of one's life in which one works for oneself. In that domain, people work, exchange goods, and maintain their families; it is therefore, in that sense, separate from the rest of society.
The parameters separating public and private spheres are not fixed but vary both in (cultural) space and in time.
In the classical world, economic life was the prerogative of the household, only matters which could not be dealt with by the household alone entered the public realm of the polis. In the modern world, the public economy permeates the home, providing the main access to the public sphere for the citizen become consumer.
In classical times, crime and punishment was the concern of the kinship group, a concept only slowly challenged by ideas of public justice. Similarly in medieval Europe the blood feud only slowly gave way to legal control, whereas in modern Europe only the vendetta would still attempt to keep the avenging of violent crime within the private sphere.
Conversely, in early modern Europe, religion was a central public concern, essential to the maintenance of the state, so that details of private worship were hotly debated and controverted in the public sphere. Similarly, sexual behavior was subject to a generally agreed code publicly enforced by both formal and informal social control. In postmodern society, both religion and sex are now generally seen as matters of private choice.
Throughout many decades, the public and private sphere have incorporated traditional gender roles. Women have mostly kept to the private sphere by staying at home, taking care of their children and attending to house chores. They were not able to participate in the public sphere, which was dominated by men. 
The private sphere was long regarded as women's "proper place" whereas men were supposed to inhabit the public sphere. Although feminist researchers such as V. Spike Peterson have discovered roots of the exclusion of women from the public sphere in ancient Athenian times, a distinct ideology that prescribed separate spheres for women and men emerged during the industrial revolution. Even writing was traditionally considered forbidden, as "In the anxious comments provoked by the 'female pen' it [was] easy enough to detect fear of the writing woman as a kind of castrating female whose grasp upon that instrument seems an arrogation of its generative power". 
Feminists have challenged the ascription in a number of (not always commensurate) ways. In the first place, the slogan "the personal is political" attempted to open up the 'private' sphere of home and child-rearing to public scrutiny. At the same time, there was a new valorisation of the personal – of experiential knowledge and the world of the body – as against the (traditional) male preserves of public speech and theory.
All the while, the public sphere of work, business, politics and ideas were increasingly opened up to female participation.
Contrary to Heidegger, Hannah Arendt argued that (public) action is the only way to manifest "who" somebody is, as opposed to describing "what" they are. She argued that only in public realm it is possible to fully express oneself. 
Deleuze and Guattari saw postmodernism as challenging the traditional split between private and public spheres, producing instead the supersaturated space of immediate presence and media-scrutiny of late capitalism.
- Habermas, Jurgen (1989). The Structural Transformation of the Public Sphere: An Inquiry into a Category of Bourgeois Society. Translated by Thomas Burger; Frederic Lawrence. Massachusetts: MIT Press. ISBN 978-0-262-58108-0.
- M. I Finley, The World of Odysseus (1967) p. 69 and p. 91
- J. O'Neill, Sociology as a Skin Trade (1972) pp. 22–3
- J. O'Neill, Sociology as a Skin Trade (1972) pp. 23–4
- R. Fagles trans. Aeschylus: The Oresteia (1977) pp. 21–2
- G. O. Sayles, The Medieval Foundations of England (1967) pp. 109, 234
- J. H. Elliott, Europe Divided (1968) p. 93-5
- F. Dabhoiwala, 'The First Sexual Revolution' The Oxford Historian X (2012) pp. 41–6
- King, Kathryn R. (1995). "Of Needles and Pens and Women's Work". Tulsa Studies in Women's Literature. 14 (1): 77–93. doi:10.2307/464249. ISSN 0732-7730. JSTOR 464249.
- Vickery, Amanda (1993). "Golden age to separate spheres? A review of the categories and chronology of English women's history" (PDF). The Historical Journal. 36 (2): 383–414. doi:10.1017/S0018246X9300001X.
- Tétreault, Mary Ann (2001). "Frontier Politics: Sex, Gender, and the Deconstruction of the Public Sphere". Alternatives: Global, Local, Political. 26 (1): 53–72. doi:10.1177/030437540102600103. S2CID 141033858.
- May, Ann Mari (2008). "Gender, biology, and the incontrovertible logic of choice". The 'woman question' and higher education: perspectives on gender and knowledge production in America. Cheltenham, UK; Northampton, MA: Edward Elgar Publishing. p. 39. ISBN 978-1-84720-401-1.
- Peterson, V. Spike (2014-07-03). "Sex Matters". International Feminist Journal of Politics. 16 (3): 389–409. doi:10.1080/14616742.2014.913384. ISSN 1461-6742. S2CID 147633811.
- Wells, Christopher (2009). "Separate Spheres". In Kowaleski-Wallace, Elizabeth (ed.). Encyclopedia of feminist literary theory. London, New York: Routledge. p. 519. ISBN 978-0-415-99802-4.
- Adams, Michele (2011). "Divisions of household labor". In Ritzer, George; Ryan, J. Michael (eds.). The concise encyclopedia of sociology. Chichester, West Sussex, U.K.; Malden, MA: Wiley-Blackwell. pp. 156–57. ISBN 978-1-4051-8353-6.
- J. Childers/G. Hentzi ed., The Columbia Dictionary of Modern Literary and Cultural Criticism (1995) p. 252
- Mary Eagleton ed., Feminist Literary Criticism (1991) p. 6
- Susan Faludi, Stiffed (1999) pp. 9, 35
- J. Collins and H. Selina eds., Heidegger for Beginners (1998) pp. 64–9
- Hannah Arendt, The Human Condition (1958)
- Richard Sennett, The Fall of Public Man (1976)
- M. Hardt/K. Weeks eds., The Jameson Reader (2000) pp. 329–30, 280
Hannah Arendt, The Human Condition (1958)
Zizi A. Papacharissi, A Private Sphere (2013)
Alan F. Westin, Privacy and Freedom (1967)