## TL;DR
Entrepreneurship transforms innovations into viable businesses. Lean Startup methodology, business model canvas, and venture capital form the modern entrepreneurial ecosystem.

## Core Explanation
The entrepreneurial process: opportunity identification → validation (customer discovery, MVP) → business model design (canvas: value proposition, customer segments, revenue streams, key resources) → funding (bootstrapping, angel, VC, crowdfunding) → scaling (hiring, process, internationalization).

## Detailed Analysis
Product-market fit — defined by Sean Ellis as "at least 40% of users would be very disappointed without your product" — is the single most critical milestone. Unit economics: LTV/CAC > 3 signals healthy growth. Cohort retention curves reveal whether users stick around.

## Further Reading
- Y Combinator: Startup School (free)
- Paul Graham: Essays
- First Round Review