Never said everyone, but it's definitely prevalent. How prevalent could be an interesting discussion (I don't know the answer) but I have many reasons to believe most people do experience it from time to time based on my personal experience and how I interpret behavior of others.
Also there is a biological/evolutionary incentive to be a bit envious and jealous which affirms my conviction that it is prevalent.
Moreover - how do you know you won't experience it in the future? Have you ever been unemployed for 4 years? Maybe being unemployed for 4 years would make you envious of a friend who just got a job in Google. Have you ever been with a woman you loved dearly only to find out she cheated on you and left you for another man? Maybe going through this traumatic experience would make you envious.
I'm just saying it's easy to be content when things are going well, indeed I don't feel much envy - but I'm super aware I am quite lucky. If things stop going well who knows what negative emotions would pop up - it won't be a picnic thats for sure.
Moreover - how do you know you won't experience it in the future? Have you ever been unemployed for 4 years? Maybe being unemployed for 4 years would make you envious of a friend who just got a job in Google. Have you ever been with a woman you loved dearly only to find out she cheated on you and left you for another man? Maybe going through this traumatic experience would make you envious.
I'm just saying it's easy to be content when things are going well, indeed I don't feel much envy - but I'm super aware I am quite lucky. If things stop going well who knows what negative emotions would pop up - it won't be a picnic thats for sure.