people often find equity unattractive. It’s not liquid like cash. It’s tied to one specific company. And if that company doesn’t succeed, it’s worthl… - Peter Thiel

Horizontal or extensive progress means copying things that work — going from 1 to n. Horizontal progress is easy to imagine because we already know what it looks like. Vertical or intensive progress means doing new things — going from 0 to 1. Vertical progress is harder to imagine because it requires doing something nobody else has ever done.

life is not a portfolio: not for a startup founder, and not for any individual. An entrepreneur cannot “diversify” herself: you cannot run dozens of companies at the same time and then hope that one of them works out well. Less obvious but just as important, an individual cannot diversify his own life by keeping dozens of equally possible careers in ready reserve.

You should focus relentlessly on something you’re good at doing, but before that you must think hard about whether it will be valuable in the future. For the startup world, this means you should not necessarily start your own company, even if you are extraordinarily talented. If anything, too many people are starting their own companies today. People who understand the power law will hesitate more than others when it comes to founding a new venture: they know how tremendously successful they could become by joining the very best company while it’s growing fast. The power law means that differences between companies will dwarf the differences in roles inside companies. You could have 100% of the equity if you fully fund your own venture, but if it fails you’ll have 100% of nothing. Owning just 0.01% of Google, by contrast, is incredibly valuable (more than $35 million as of this writing).