Русско-англо-русский юридический словарь

As teenagers start thinking about how unfair the world is, they may decide they need to do something about it, like start a school protest. Or they might start attending local marches or protests. Another example of adolescent idealism might be a teen deciding they need to do their part in saving the planet. (Newport Academy)

But there's good reason to stress the more universal elements, ones we can all understand, though not necessarily support: the rage against injustice, adolescent idealism, "fuelled," as a researcher said, "by extremist dogma." (The Globe and Mail)

... adolescent idealism means that people in their late teens and early 20s hold to very high moral standards. (Human Adaptation to Extreme Stress: From the Holocaust to Vietnam)