Nearly half the world's countries are seeing the level of democracy decline, an international think tank said Thursday.

And some countries with historically long democratic traditions are among them.

The Stockholm-based International Institute for Democracy and Electoral Assistance (International IDEA) said 85 out of 173 countries surveyed had "suffered a decline in at least one key indicator of democratic performance in the past five years".

"Many established democracies are experiencing setbacks… ranging from declines in social group equality in the United States, freedom of the press in Austria, and access to justice in the United Kingdom," it added.

"This is the sixth year that we've seen more countries with democratic declines than improvements," its program officer, Michael Runey, told AFP. He is one of the authors of "The Global State of Democracy 2023" report

That six-year trend represented the longest "democratic recession" the organization had seen since it started collecting data in 1975, he added.

The rule of law embodied by independent courts and freedom from political violence was also weakening in countries such as Austria, Hungary, and Peru, the report noted.

The "bedrocks of democracy are weakening across the globe", it warned.

While the declines could be seen in all parts of the world, in Africa they were exemplified by the wave of coups d'etat there.

Checks, balances weakened

In the rights category, the authors noted declines in freedom of expression and freedom of assembly, though overall declines were not significant.

In the category of rule of law, there were improvements "after many years of stagnation in levels of corruption", though the picture was "not unambiguously positive", the report said.

Democratic deterioration has also been exacerbated by an erosion of "checks and balances", which in the authors' view goes beyond the traditional understanding of the term.