Global experiences of post-war and post-conflict recovery and reconstruction show that preparations for the post-war period should begin even before the conflict ends. For Ukraine's post-war recovery, promoting social entrepreneurship and implementing social innovations is crucial. These efforts will foster practical cooperation between the state, businesses, and the public, addressing various challenges collectively, solving socio-economic problems, and implementing reforms. The purpose of this article is to study the essence and evolution of knowledge about constructs and concepts in the fields of social innovation and social entrepreneurship, to substantiate the opportunities for the dissemination of social innovations, and to create conditions for social entrepreneurship in addressing social needs in the context of Ukraine's post-war recovery. Given its fragmented conceptualisation and widespread use by scholars, policymakers, and practitioners, this study is driven by the need for a theoretical justification of social innovation and entrepreneurship. Methods: To achieve this goal and solve specific tasks, empirical and theoretical research methods were used: analysis, synthesis, and generalisation. These methods, applied at a dialectical level, provide a scientific basis for theoretical and methodological approaches to introducing social innovations in public life. With the help of multidisciplinary ontological analysis and the use of bibliometric indicators, such as citations, co-citations, bibliometric links and coincidences, the main research trends in the knowledge clusters of social innovation and social entrepreneurship were identified. This was accomplished through system mapping with the VOSviewer tool and the analysis and synthesis of publications on social innovation and social entrepreneurship for deep theoretical and practical understanding, as well as evaluation of current research at the interdisciplinary level. Results and Conclusions: Ukrainian legislation does not define the concepts of "social innovation" and "social entrepreneurship," which hinders the development and functioning of social entrepreneurship and the production of social innovations. The war and its aftermath have created new challenges that require new practical approaches and means of solving social problems. One of these approaches is to combine the measures of the current social policy in Ukraine, limited by the organisational and financial involvement of the state in solving social problems, with the possibilities of public participation and entrepreneurial activity. Introducing modern world practices of social innovation and social entrepreneurship, as well as regulatory regulation of social enterprises, will be an essential step towards developing the non-governmental sector of social development and social protection policy.