Ukraine’s president, Volodymyr Zelensky, recently signed a decree to withdraw from the Ottawa convention banning the use of anti-personnel landmines. This move follows the example of Finland, Poland, Estonia and Lithuania, who all quit the treaty in recent months.The logic behind these states withdrawing from the treaty is mostly because of the threat posed by Russia. At first glance landmines seem like a cost-effective way to deter or slow an invader. Proponents see them as a necessary evil to protect national sovereignty against the threat from a much larger conventional force deployed by an aggressive neighbour.But this short-term thinking can be dangerous, because it doesn’t consider the long-term cost of putting explosive devices into the ground. According to the Landmine Monitor for 2024, more than 110,000 people were killed by landmines and explosive remnants of war in the past 25 years, and over 5,700 died just last year. Eight out of ten of those killed were civilians, many of whom were children.Sign up to receive our weekly World Affairs Briefing newsletter from The Conversation UK. Every Thursday we’ll bring you expert analysis of the big stories in international relations.Although it is cheap to lay landmines, demining is expensive and creates a financial burden for future generations. The UN estimates that it can cost between five and 100 times more to clear a mine than to lay one, depending on the circumstances.In Angola, for example, demining efforts continue nearly 50 years after the civil war broke out and 23 years after it ended. Encouragingly, Angola has reduced the threat with help of Halo Trust, a UK-based nongovernmental organisation. In 30 years they destroyed over 123,000 landmines. But to get Angola landmine free will require about US$240 million (£177 million) in additional funding.While Angola aims to be landmine-free within a few years, the current scale of contamination in Ukraine will pose a deadly hazard to civilians for generations, as Sarah Njeri – a landmines expert at SOAS, University of London, wrote in 2023.Looking through the prism of peaceWhat Europe needs today is better analysis and more public awareness of the current crisis and its long-term effects. This is a tricky task, especially for the media, because the violence is “asynchronous”. This means that mines can be laid years before anyone is harmed by them. It’s important to have open and honest conversations in public so that both politicians and the public have something clear and trustworthy to rely on when making these fateful decisions. This means accepting that the concerns of the Baltic nations, Poland and Finland are valid. Their actions are a response the threat posed by Russia and the uncertainty surrounding America’s future role on the world stage. But there’s also an opportunity. Nobody in these countries takes the decision to use landmines lightly. This means, that if their European allies can provide credible security guarantees, these countries might change their plans.Nevertheless, the Peace Report 2025, compiled by four leading German peace research institutes, highlights that this way of thinking remains rooted in a military mindset. The planned increase in military budgets among Nato countries should be complemented by greater investment in diplomacy, peace research and peace building. The Peace Report lists nine recommendations for a more peaceful world, which are not pacifist. They recognise the need to close the gaps in European defence capabilities – but this is not enough. To create a peaceful Europe the legitimate security interests of all sides need to be considered. This includes Russia. At the same time, the report emphasises the need to strengthen, not weaken, the rules-based order. Abandoning the Ottawa treaty will further weaken that order.Withdrawing from the landmine treaty is not just a military calculation, and it affects more than just eastern European countries. It’s an issue that presents a real challenge to Europe as a whole. Laying mines would litter future farmland and forests with an indiscriminate threat that recognises no ceasefire and cannot distinguish friend from enemy, combatant from civilian or adult from child.If we don’t learn from the past, future reports will still be counting thousands of child casualties, but from the landmines laid in the 2020s.Get your news from actual experts, straight to your inbox. Sign up to our daily newsletter to receive all The Conversation UK’s latest coverage of news and research, from politics and business to the arts and sciences.Marcel Vondermassen does not work for, consult, own shares in or receive funding from any company or organisation that would benefit from this article, and has disclosed no relevant affiliations beyond their academic appointment.