* Optimism: This is the most common and straightforward answer. An optimist believes in the good of humanity and the possibility of positive change, while a cynic doubts these things.
* Idealism: Idealists have strong beliefs in moral principles and strive for perfection, often believing in the potential for positive change. Cynics, on the other hand, are skeptical and often believe in the inherent flaws of humanity.
* Trust: Cynics often distrust others and view their motives with suspicion. The opposite would be to trust people and their intentions.
* Hope: Cynics can be pessimistic and lack hope for the future. The opposite would be to have hope for the future and believe in the possibility of positive change.
* Faith: This is a broader concept that can encompass belief in a higher power, but can also apply to having faith in oneself and others. Cynics often lack faith in anything or anyone.
The best opposite for "cynicism" depends on the context and the specific aspects of cynicism you're considering.