Quixotism

Quixotism (/kwɪkˈsɒtɪzəm/ or /kiːˈhoʊtɪzəm/; adj. quixotic) is impracticality in pursuit of ideals, especially those ideals manifested by rash, lofty and romantic ideas or extravagantly chivalrous action.^[1] It also serves to describe an idealism without regard to practicality. An impulsive person or act might be regarded as quixotic.

Quixotism is usually related to "over-idealism", meaning an idealism that doesn't take consequence or absurdity into account. It is also related to naïve romanticism and to utopianism.