For much of the twentieth century, Realist and Idealist approaches dominated the
thinking on the problem of “national security”. The concept of security was secondary to
the discussion. It was usually seen as a derivative of power, in the sense that “an actor
with enough power to reach a dominating position would acquire security as a result” or
“as a consequence of peace: a lasting peace would provide security for all” (Buzan, 1983,
pp. 2-3). Unlike the vast literature on power, which not only included a substantial
amount of empirical studies, but also a well-developed conceptual and theoretical body
of work, the lack of studies on security was another sign that the concept was not fully
developed. Security was seldom addressed unless it served the political interests of
specific actors or groups, and it was only discussed in military terms. A few conceptual
works had been published on the subject of security, but there was nothing that could
be considered a coherent school of thought. However, for Barry Buzan (1983, p. 2),
security was “much more powerful … [and it deserved] elevation to equal rank with power
and peace”.
Ole Wæver, another important theorist of the CS, states that “security has an everyday
meaning”, but that the term has acquired different connotations derived from the
“international discussion of national security [and] security policy” (Wæver, 1995, p.69).
Weaver argues that, historically, security has been “the field where states threaten each
other, challenge each other’s sovereignty, try to impose their will on each other, defend
their independence, and so on”, but acknowledges that the “strong military identification
of earlier times has been diminished” (1995, p. 69). Therefore, he proposes an alternative
way of defining a wider concept of security: “to broaden the security agenda to include
threats other than military ones” (Wæver, 1995, p. 70). As he builds his theory, Wæver
(1995, p. 73) moves from “alternative security” to “security as a speech act”, stating
that “[w]ith the help of language theory, we can regard ‘security’ as a speech act” and
that using it “had the effect of raising a specific challenge to a principled level”, which
implies “that all necessary means would be used to block that challenge”. And because
this threat would be defined as “existential and a challenge to sovereignty”, the State
would not be limited in what it could do. Therefore, “a problem would become a security
problem whenever so defined by the power holders” (Wæver, 1995, p. 74).
Buzan notes that, since the end of the Cold War, the theoretical literature on security has
become particularly active. As a result of this theoretical revitalisation, the debate has
split into three distinct schools: the traditionalists, who wish to keep the focus on military
issues; those who want to extend the concept of security to sectors other than the
military; and a new school of critical studies, whose proponents want to encourage a
more questioning attitude about the framework in which security is conceptualised.
According to Buzan, while is some overlap among these schools, there is also open
disagreement. Buzan agrees with those who wish to broaden the concept and refutes the
traditionalist criticism that “widening makes the concept of security incoherent” (Buzan,
1997, p. 5).
The widespread sentiment in the mid-1990s was that the international system would
become more decentralized and regionalized in the post-Cold War. Reflecting this,
another book proposed a new framework for analysis for security studies, one which
examined the different security dynamics in five sectors: military, political, economic,
environmental and societal (Buzan, Wæver, & Wilde, 1998).