Every human being is 'happy', that is, until they are taught to want things that they do not need, and then are told that they can not get what they want, and/or are forced to do things that they do not want to do or not allowed to do what they want to do.
So, when people are living in 'this way', like in 'current times', then 'happiness' exists only in a temporal state. But, this is not how it has always been, nor how it will always be neither.