Compounding rewards starting early far more than starting big

The book's title metaphor is deliberate: a snowball's final size depends less on how hard you pack it at the start than on how much wet snow and how long a hill it rolls down. Buffett began buying stocks and running small businesses as a boy, which meant his money had roughly eight decades to compound rather than the four or five most successful investors get. Schroeder shows that the overwhelming majority of his net worth accumulated after age fifty, a fact that looks paradoxical until you recognize compounding is exponential, not linear — gains on gains eventually dwarf the original principal.

This reframes what "getting rich" actually requires: not necessarily higher returns than everyone else, but a much longer runway of moderate, consistent returns without interruption. Buffett's real edge was less his stock-picking than his refusal to stop, spend down, or panic-sell across seven decades of market cycles. Takeaway: time in the market, not just skill in the market, is the dominant variable in extreme wealth.