[pddpro]

While I agree with most of what's written, I think that revenue from volatile stocks does come at others' expense and, thus, might not be an example the author should be including.

[biscottigelato]

Building companies are not necessarily zero sum tho. You can win over your competition by delivering value. The value delivered to society generally more than cover of the loss your competition encounters. On net its a positive sum game that the more this is done, the more net positive society sees.

Assuming fair competition based on innovation on efficiency of course. Corruption and coercion not apply