Eventually, his lust for power and wealth caused him to engage in illegal weapons deals. When Tony Stark, the CEO of Stark Industries, discovered this, Stane used his high position within the company to increase his power, while decreasing Stark's. (Read More)
Selvig: "He was distraught when he found out you've taken all of our research. That was years of his life, gone. You can understand how a man could go off like that. A big faceless organization like yours coming in with their jet-booted thugs and... That's how he put it."
Coulson: "That still doesn't explain how he managed to tear through our security."