Aimé Bonpland’s experience leads us to reflect about the necessary conditions for the transfer of a science and the ideology it bears. In favour of the independence of the Rio de la plata, imbued with a political culture putting forward the necessity of a strong state thus enabling a nation to be stable and to shine forth, Bonpland comes up against the instability that characterizes the political construction of this region. By following his path, we witness the wasted accounter between, on the one hand a naturalist bearing a project based on the universalist pattern of the European scientific center, and, on the other hand the elites who, at the periphery, want to settle a specific policy based on the use of natural resources aiming at international development. This experience enables to bring to the fore different moments of the construction of the Rioplatenses nations and to insert them from an americanist perspective. The notion of americanism tackled as a set of ideologies into action whose main property is the development of cultural interactions, arises the issue of the convergence of ideologies and of their transatlantic adaptation. Indeed, to become operating, it is necessary to wait for the setting up of political and scientific rioplatenses projects, based on the outsourced production of knowledge, for the scientific action led by Bonpland, itself based on applied research, to become operating. It is necessary to put Bonpland’s position back in this continuity, from the inadequacy between the scientific supply and demand, up to the convergence of americanist projects.
