"Youthful idealism" refers to the optimistic and passionate beliefs held by young people who envision a better world and strive to make a positive difference. Full definition
The film depicts the unsentimental embrace of youthful idealism in the backdrop of the Tiananmen Square protests in 1989 and the mundanity of postgraduate life. (para-site.org.hk)
Are any of these definitions realistic, or are they steeped in youthful idealism? (bookbrowse.com)
Avery was drawn to Ethan's youthful idealism with a spark for life that is extremely infectious. (cougarsmeet.com)