Intergenerational equity is a matter of justice, as John Rawls recalled: A just society protects the rights of those who live today and those who will be born tomorrow. European policies must be guided by this principle, integrating the perspective of future generations into every public decision. Hans Jonas, in his “principle of responsibility”, reminds us that humanity has a moral duty towards the future. This means adopting governance that assesses the long-term impact of environmental, economic and social choices. A fair Europe must be based on four pillars. First, intergenerational dialogue: Deliberative democracy arises from open and inclusive confrontation between citizens of different ages. Second, an education for planetary citizenship that values shared responsibility in the ‘common world’. Third, the justice of opportunity, according to Amartya Sen's vision, so that each generation can develop its own capabilities. Finally, an ethic of care that recognises vulnerability as a human link and the foundation of solidarity. Intergenerational Equity must become a new European social contract: a pact of trust and mutual responsibility to ensure the continuity of the common good over time.