Major Prophets of To-Day explores the thinkers who transformed modern life through ideas rather than armies. Edwin E. Slosson profiles scientists, philosophers, and reformers whose theories challenged inherited beliefs and reshaped culture.

Written with clarity and narrative warmth, the book traces how new concepts emerged from laboratories, lecture halls, and social movements. Slosson shows that intellectual change is not abstract: it is driven by human struggle, ambition, doubt, and conviction.

This illustrated edition enriches the text with original artwork and adds new contextual material for contemporary readers. Together, they present a vivid portrait of an age when ideas became engines of history — and when thinkers became prophets of modernity.