Here's the actual article from Harvard Business Review: https://hbr.org/2018/07/research-the-average-age-of-a-successful-startup-founder-is-45 https://hbr.org/

Here's the actual article from Harvard Business Review: https://hbr.org/2018/07/research-the-average-age-of-a-successful-startup-founder-is-45 https://hbr.org/2018/07/research-the-average-age-of-a-succes... The graphs there are quite telling.