The Evolution of Conflicts: Understanding New Trends and Challenges

War is not what it used to be. For most of recorded history, conflict meant two armies, two states, and a clearly marked battlefield. But over the past few decades, the picture has changed dramatically. Wars today are more likely to be fought inside countries than between them, to involve fighters who wear no uniforms, and to harm civilians more than soldiers. Understanding this shift is essential for anyone studying conflict resolution, because the methods we use to make peace must match the kind of war we are actually facing. This post examines how the nature of conflict has changed, what is driving these trends, and why scholars like Mary Kaldor argue that we are living in the age of “new wars.”

From wars between states to wars within them 🔗

The single biggest change in modern conflict is where it happens. During the first half of the twentieth century, the dominant image of war was interstate: nations fighting other nations over territory, resources, or ideology. After the end of the Cold War in 1989, that pattern broke down. Conflicts increasingly became intrastate, meaning they were fought within the borders of a single country rather than across them.

The numbers make this striking. According to the Uppsala Conflict Data Program, 39 of the 40 active armed conflicts recorded in 2015 were intrastate rather than between states. This is a near-total reversal of the historical norm. Civil wars, insurgencies, and internal armed struggles have become the default form of organised violence in the contemporary world.

Why did this happen? One major reason is the end of the proxy war system. During the Cold War, the United States and the Soviet Union backed opposing sides in conflicts across Asia, Africa, and Latin America. When that rivalry ended, 1989 marked a clear shift in the drivers, nature, and intensity of intrastate conflict. Some proxy wars wound down, but in many states the collapse of external support exposed deep internal fractures along ethnic, religious, and political lines.

Internal wars rarely stay internal 🔗

One important point to grasp is that the line between “internal” and “international” conflict is increasingly blurry. Even when a war begins as a domestic struggle, outside powers often get involved by sending money, weapons, or troops to one side. The United Nations University notes that of the 47 intrastate wars recorded in 2016, 18 of them were internationalised because external states contributed troops to one or more sides. The Syrian civil war is a clear example, where regional and global powers turned a domestic uprising into a battleground for competing strategic interests.

This means that the neat textbook categories of “interstate” and “intrastate” no longer capture reality cleanly. A conflict can be internal in origin but international in its participants and consequences, with violence spilling across borders and drawing in neighbours.

The Arab Spring and the challenge to authoritarian rule 🔗

Another defining feature of contemporary conflict is the wave of popular movements challenging long-entrenched authoritarian governments. The clearest example is the Arab Spring, a series of pro-democracy uprisings that swept across the Middle East and North Africa beginning in late 2010.

The trigger was deeply personal. The protests began after the self-immolation of Mohamed Bouazizi, a 26-year-old Tunisian street vendor protesting his treatment by local officials. What started as one act of desperation became a regional movement, as protests in Tunisia and Egypt toppled their regimes in quick succession and inspired similar attempts across the Arab world. The underlying causes were widespread: unemployment, corruption, poverty, and decades of political repression.

Why the uprisings surprised experts 🔗

The Arab Spring is significant for conflict studies because it overturned assumptions about the durability of authoritarian regimes. For years, scholars had focused on explaining why so many autocracies seemed remarkably resistant to change in an age of democratisation. Then several of the regimes considered most stable collapsed in the face of mass street protests, showing that formal institutions did little to insulate rulers from popular discontent.

However, the outcomes were mixed, and this is where the story becomes complicated. While Tunisia made meaningful progress toward democracy, in Egypt the democratisation process was reversed and authoritarian rule was re-established. In countries like Libya, Syria, and Yemen, the collapse of authoritarian regimes created a power vacuum that was filled by armed non-state actors, including extremist groups. In several of these cases, the hope of democratic transition gave way to civil war.

The lesson is that the spread of democratic aspirations does not automatically produce stable democracies. The same forces that challenge an authoritarian regime can, when the state collapses, unleash a new and often more violent phase of internal conflict. This connects directly to the rise of civil wars discussed earlier.

Mary Kaldor and the “new wars” thesis 🔗

To make sense of these changes, the work of British academic Mary Kaldor is essential. In her influential book New and Old Wars: Organised Violence in a Global Era, first published in 1999, Kaldor argues that the actors, goals, methods, and financing of war have changed so significantly in the era of globalisation that we need a new framework to understand them.

Kaldor draws a contrast between “old wars” and “new wars.” Old wars were typically fought between the armed forces of states, for ideological or geopolitical goals, financed through national taxation, and decided through battles. New wars look very different. As her thesis describes, contemporary conflict is characterised by violence between varying combinations of state and non-state networks, fighting in the name of identity politics rather than ideology, and financed not through the state but through predatory means that seek to continue the violence.

The four key features of new wars 🔗

It helps to break Kaldor’s argument into its main components, which together explain why modern conflict feels so different from the wars of the past.

Diverse actors: New wars are rarely fought by two clearly defined national armies. Instead they involve a mix of regular forces, paramilitary groups, warlords, mercenaries, and criminal gangs. The clean distinction between “soldier” and “fighter” dissolves.

Identity-driven goals: Where old wars were often fought over ideology or national interest, new wars are frequently driven by ethnic, religious, or tribal claims, with actors seeking to capture the state for a particular group rather than for the public interest. This is why so many modern conflicts are tied to questions of identity.

Unconventional methods: In new wars, large set-piece battles are rare. Instead, armed groups try to achieve political control of a population through fear, terror, and displacement, often targeting civilians directly rather than confronting rival forces.

New forms of financing: Old wars were funded by states. New wars are often sustained through plunder, smuggling, black markets, and the control of valuable resources. This creates a troubling incentive: for some actors, the continuation of war becomes more profitable than peace.

The blurring of battlefronts and civilian spaces 🔗

Perhaps the most disturbing feature of new wars is what they mean for ordinary people. In the past, war was something that happened between armies on a battlefield. Today, the distinction between the battlefront and civilian space has collapsed.

The statistics Kaldor and other scholars cite are sobering. At the start of the twentieth century, the overwhelming majority of war casualties were soldiers. By the late 1990s, that ratio had been almost exactly reversed, with around 80 percent of all casualties in wars being civilians. In many modern conflicts, civilians are not accidental victims caught in the crossfire; they are deliberate targets.

This happens because controlling and terrorising a population is itself a strategy. Forced displacement, ethnic cleansing, and human rights violations become tools of war rather than tragic side effects. The Bosnian civil war of the 1990s is often cited as a textbook example, marked by forced displacement, paramilitary groups, and violence organised explicitly around ethnic identity.

Why this matters for conflict resolution 🔗

The shift toward new wars creates real problems for those trying to build peace. Traditional approaches to ending conflict, such as ceasefires negotiated between two state armies and peace treaties signed by recognised governments, assume a kind of war that increasingly does not exist. When a conflict involves dozens of fragmented armed groups with economic incentives to keep fighting, there may be no single leader who can credibly sign a peace deal.

This is precisely why Kaldor insists on keeping the term “new wars” even though she acknowledges these conflicts have historical precedents. As she has explained, the older international strategies have failed to address the characteristics of new wars and instead continue to treat them as conventional warfare. The label is meant to push policymakers toward fresh responses rather than recycling old methods that no longer fit.

The debate: how new are new wars? 🔗

It would be incomplete to present the new wars thesis without noting that it is contested. A fair assessment requires acknowledging the criticism. Several prominent scholars have challenged Kaldor’s framework, and the disagreement is itself instructive for students of conflict.

The political scientist Stathis Kalyvas, for instance, has questioned whether the distinction between “new” and “old” civil wars is actually a valid one. Other critics argue that there is nothing genuinely new about so-called new wars, pointing out that civilians have always suffered terribly in conflict and that identity-based violence is hardly a recent invention. Some also question whether the data truly shows a clear rise in civilian casualties and non-state actors since 1990.

Kaldor’s response is that critics often lump together different versions of her argument and treat a criticism of one part as a refutation of the whole. She clarifies that calling these wars “new” was never a claim that they have no historical parallels. Rather, it points to a different underlying logic from the conflicts that scholars and policymakers had been focused on. Whether or not one fully accepts the thesis, it has succeeded in opening up new lines of scholarly analysis and new policy perspectives, which most critics concede was its real value.

Bringing the trends together 🔗

The changing nature of conflict is best understood as several connected trends rather than a single phenomenon. The decline of interstate war and the rise of internal conflict set the stage. The Arab Spring showed how popular movements can topple authoritarian regimes but also trigger state collapse and civil war. Kaldor’s new wars thesis ties these threads together by explaining how contemporary violence is organised differently, with new actors, identity-based goals, predatory financing, and a devastating impact on civilians.

For anyone studying methods of conflict resolution, the takeaway is clear. The tools of peacebuilding must evolve alongside the conflicts they are meant to resolve. A peace process designed for a war between two states will struggle to end a fragmented internal conflict involving warlords, identity politics, and a war economy that rewards continued violence. Recognising how war has changed is the first step toward responding to it effectively.

What do you think? If most modern wars are now fought inside states rather than between them, should international institutions like the United Nations rethink how they intervene in conflicts? And do you find Kaldor’s argument that these are genuinely “new” wars convincing, or do you think violence against civilians and identity-based fighting have always been part of human conflict?

References

1. https://www.academia.edu/42318383/Changing_conflict_dynamics_since_the_Cold_War_quantitative_or_qualitative_transformations
2. https://www.rand.org/content/dam/rand/pubs/research_reports/RR1000/RR1063/RAND_RR1063.pdf
3. https://unu.edu/cpr/project/fragile-contexts-are-increasingly-battlegrounds-geopolitical-contests
4. https://www.britannica.com/event/Arab-Spring
5. https://ecpr.eu/Events/Event/SectionDetails/675
6. https://www.numberanalytics.com/blog/understanding-arab-spring-impact
7. https://en.wikipedia.org/wiki/New_wars
8. https://academicjournals.org/journal/JLCR/article-full-text-pdf/BEA811B47455
9. https://www.researchgate.net/publication/249687763_The_'New_Wars'_Debate_A_Historical_Perspective_is_Needed
10. https://stabilityjournal.org/articles/10.5334/sta.at