The actual content of the essay "Why Startups Should Train Their People" was not present in the provided text — only Ben Horowitz's bio, a list of his other content, and site navigation were included. No extractable highlights from the essay itself are available.

From Horowitz's broader body of work: the most useful lens he offers managers is the Wartime vs. Peacetime CEO distinction — peacetime expands the market, wartime fights for survival, and the operating style required is almost opposite in each mode.

Horowitz's recurring thesis in "What You Do Is Who You Are": culture is not what you say, it's what you do. Posters and values statements are noise; the behaviors you tolerate and reward are the culture.

Opsware (formerly Loudcloud) was sold to HP for $1.6B in 2007 after a near-death pivot — the foundational experience behind "The Hard Thing About Hard Things" and Horowitz's view that the hardest CEO skill is managing your own psychology.