The Association of Southeast Asian Nations (ASEAN) continues to struggle with a persistent image problem, characterized by a perceived inability to act decisively during regional crises despite evidence of successful mediation. According to a fresh ASEAN effectiveness survey, a significant portion of the region’s elite remains skeptical of the bloc’s capacity to handle fluid political and economic shifts.
The findings, detailed in the ISEAS – Yusof Ishak Institute‘s “The State of South-east Asia 2026” report, highlight a deep-seated tension between the organization’s institutional limits and the urgent needs of its member states. While the bloc was credited with helping resolve a violent border dispute between Thailand and Cambodia, nearly 35 per cent of respondents still view the grouping as slow and ineffective.
This perception of inertia remains largely stagnant, with 34.7 per cent of those polled expressing this concern—a figure nearly identical to the 35 per cent recorded in the 2025 survey. The poll, conducted between Jan. 5 and Feb. 20, 2026, gathered perspectives from 2,008 respondents across academia, government, business, and regional organizations.
The Thailand-Cambodia Border Crisis: A Case Study in Constraint
The 2025 border conflict between Thailand and Cambodia served as a critical test for ASEAN’s diplomatic machinery. The violence began with a five-day clash in July 2025, followed by a more severe round of fighting in December of that year. The escalation resulted in the displacement of more than one million civilians before a ceasefire was finally signed on Dec. 27, 2025.
The road to peace involved a special meeting of ASEAN foreign ministers in Kuala Lumpur on Dec. 22, 2025, which paved the way for the final agreement. For some, this was a victory for regional diplomacy; 38.9 per cent of respondents agreed that ASEAN actively mediated to halt the dispute through ministerial meetings and diplomacy. Another 28.1 per cent believed the bloc did its best given its institutional constraints.
However, the resolution as well exposed the bloc’s reliance on outside help. Washington intervened to push for an October 2025 truce, while Beijing provided critical backing for the December ceasefire. This external involvement led 11.2 per cent of respondents to question whether ASEAN can truly address regional issues on its own terms.
Institutional Inertia and the ‘Non-Interference’ Dilemma
At the heart of the criticism is ASEAN’s long-standing commitment to decision-making by consensus and the principle of non-interference in the internal affairs of member states. While these rules maintain a fragile peace between diverse regimes, they often hinder rapid responses to emergencies.
Joanne Lin, an ISEAS senior fellow and co-author of the report, noted during an April 7 webinar that the data reflects a growing awareness of these internal constraints. Lin pointed to doubts regarding the bloc’s ability to implement plans, address development disparities, and respond effectively to crises like the Cambodia-Thailand conflict.
The regional grouping needs stronger unity in order to have better implementation capacity and a great willingness to use all the tools that it already has – ASEAN has many tools, but it doesn’t mean that all of them are being utilised.
The report suggests that the bloc is underutilizing its own framework. Specifically, 13.5 per cent of respondents believed ASEAN failed to employ all available resources, such as the High Council of the Treaty of Amity and Cooperation, to resolve the border dispute.
Regional Leadership and Geopolitical Priorities
Despite the criticisms of the collective body, individual member states are still viewed as vital pillars of stability. Singapore emerged as the top contributor to addressing regional challenges, recognized by 31.3 per cent of respondents, primarily for its economic leadership.
| Country | Respondent % | Primary Reason for Recognition |
|---|---|---|
| Singapore | 31.3% | Economic Leadership |
| Indonesia | 22.2% | Consensus Building |
| Malaysia | 21.3% | 2025 Chair Leadership |
Indonesia was lauded for its ability to build consensus, while Malaysia received credit for its strong leadership during its tenure as ASEAN chair in 2025.
The survey also mapped the region’s primary anxieties. The Thailand-Cambodia conflict ranked fourth among geopolitical concerns, cited by 40.5 per cent of respondents. It trailed concerns regarding U.S. Leadership under President Donald Trump, the proliferation of global scam operations, and ongoing aggression in the South China Sea.
The Myanmar Stalemate
The crisis in Myanmar remains a persistent wound for the region, ranking fifth on the list of concerns at 28 per cent. The appetite for a shift in strategy is growing; 40.4 per cent of respondents now believe the best path forward is independent dialogue with all key stakeholders, including the shadow National Unity Government. This represents a notable increase from the 33.9 per cent who supported this approach in 2025.
As the region navigates an era of heightened great-power competition and internal volatility, the pressure on ASEAN to evolve its “ASEAN Way” of diplomacy continues to mount. The next major assessment of the bloc’s progress will likely center on its ability to maintain the Thailand-Cambodia ceasefire without further external intervention.
Do you believe ASEAN’s principle of non-interference is still viable in 2026? Share your thoughts in the comments below.
Related reading
