In this paper, we reviewed theoretical and empirical evidence explaining the level of support for protected areas and proposed a new approach when designing and designating protected areas in Europe. This approach models the process of the introduction of a new protected area as a policy intervention within a socio-ecological system. Specifically, it models how protected area social outcomes or impacts are conditioned and contextualised by numerous intervening factors relating to the social context and governance and management system to influence local actors’ attitude and active support for the protected area. This new approach aims to assist policy makers, conservation practitioners and scientists to plan actions that assist in increasing the level of public support for protected areas in the context of the post 2020 Biodiversity Strategy of the European Union. The full article is available here: https://www.mdpi.com/2073-445X/11/5/733