Idealism
Idealism was a philosophy that viewed things in a favorable and sometimes unrealistic light. 

According to Azetbur, her father Gorkon was seen as an idealist, in regards to his hope for peace between the Klingon Empire and the Federation. She believed that were it not for Praxis's explosion, his idealism would not have become reality. ()

Luther Sloan described Julian Bashir as a misguided idealist. ()

Upon being described as an idealist, Beverly Crusher commented that she lived in an ideal culture. ()

In 2373, Chakotay wondered how long the New Cooperative's ideals would last with the  to impose their collective will on others. ()

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Philosophical movements