Wouldn't justice be a cause for wars too? Even if energy was limitless or extremely cheap, this wouldn't mean people will stop being mean right? Something else

Wouldn't justice be a cause for wars too? Even if energy was limitless or extremely cheap, this wouldn't mean people will stop being mean right? Something else will become too valuable and greed and other human traits will cause injustices and people will still fight to enforce/overthrow the injustice no?