Tim Cook transformed Apple into a $4 trillion goliath during his tenure as CEO, adding $682 million in market value daily. The soft-spoken operator successfully filled Steve Jobs' shoes while shifting manufacturing to China, enabling massive production at low costs that put iPhones in half of American homes.

Apple's deep China roots came with geopolitical consequences. The tech giant helped train 30 million workers and invested hundreds of billions, inadvertently fueling China's economic rise. Cook's compliance with Beijing's demands to remove apps and move iCloud data highlights the ethical quandaries of doing business with authoritarian regimes.

Cook's successor faces tough choices with Apple still heavily dependent on China. The company has made tentative moves to expand iPhone assembly to India, but the architect of the current strategy remains as executive chairman, potentially limiting new approaches to geopolitical risks that could threaten Apple's future.