Who is John Stuart Mill from Historical and Philosophical Foundations of Education: A Biographical Introduction and what is their importance?

John Stuart Mill was considered "foremost theoretician of the new humanitarian liberalism" when liberal ideology transitioned from natural rights and laissez-faire concepts to humanitarian social reform. James Mill, father of John Stuart Mill who lived from 1806-1873, was born at the same time as liberalism's evolution. His childhood was surrounded by the influence of the senior Mill and Bentham as the heir of their tradition. John Stuart was raised on philosophy and controlled by his father except for a short time in France before he started a job at the East India Company that his father got him. The son suffered years of depression from his father's control and except for a purported platonic relationship with a friend Harriet, whom he married when her husband died, had few outlets for his anxiety.