No, of course not. It's just an amazing coincidence that throughout the various cultures of Earth people laugh when they're happy and cry when they're sad.
That's your 'explanation' behind 'human nature'?
Humans are capable of wide range of emotions (a biological trait) - but we are NOT intricately 'pre-programmed' to be (for example) greedy, selfish and competitive - those are learned behaviors that stem from our environment.
Also, emotions are nothing more than a series of reactions to external stimulus (do NOT mistake this for 'instincts' though as those don't exist in humans either - motor functions and reaction to external stimulus is NOT 'instinct'). Our behavior (which stems from the environment) dictates which emotions will manifest (if they will at all) and how will they manifest.
Different cultures exhibit different reactions at stimulus - if 'human nature' existed, they would exhibit them in exactly the same manner - but see... they DON'T - some even don't exhibit or feel emotions in situations where others would.
If a human is for example a homophobe... or essentially intolerant of others... do you really think that having growing up in an environment that fosters those kinds of behaviors has 'nothing' to do with it?
Even though we have direct evidence (arrived at through the scientific method) that supports that?
Furthermore, how about those who grew more tolerant after being educated?
That's some poor 'human nature' if it basically crumbles and changes in the face of relevant education.
If you were taken at birth and left with the Amazon head hunters... you would grow up to adopt the values, notions and behavior of that culture and would also speak their language - especially if you were never exposed to anything else.
You think an Eskimo dreams of a mansion, fast cars or similar notions?
An Eskimo has 0 knowledge of what any of those things are - they don't even have a frame of reference.