Other goals that only account for the self are of a narrow-minded view of success. One cannot truly be successful by themselves in a society.
It also makes more sense from a utilitarian standpoint to consider the success of everyone. Since we are arguing the usefulness of criticism and promotion, it only makes sense that an action that affects the most amount of people in the most positive way has the largest measure of usefulness due to the sheer unit of measure.
I'm going to start here and may or may not be playing devils advocate.
"Success = the overall 'long term' and 'sustainable' happiness of everyone involved"
"Other goals that only account for the self are of a narrow-minded view of success."
What if you are going for long term sustainable happiness of most people involved. You don't have to only account for yourself while having a different goal. What if you don't change the happiness of others by making yourself happy is that not at least a small success.
I may have a narrow minded view that if I stand in fire for a long period of time I will die. Since in most situations I am correct does being narrow minded matter? I don't consider the other possibilities exempting fire suits.
"One cannot truly be successful by themselves in a society." One can be successful by themselves in society even with a utilitarian view if they achieve the overall 'long term' and 'sustainable' happiness of everyone involved.
The problem is you are far to subjective, you have an initial point that is correct because you believe in it and that is what you base all following arguments on. Now thankfully I have left you an out. Your view on success may be narrow minded and subjective but it also may be correct.
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I am am perfectionist (believe it or not) and so I fall on the critic side when it comes to improvement. That said after criticizing something I then go "But if you fix that I'll be perfect!" and promote whatever it is or at least the possibility of what it could be.