Read more Herbert Spencer. The English philosopher, biologist, anthropologist, sociologist, and prominent classical liberal political theorist coined the phrase "survival of the fittest." Super soft women's tee, fitted, lightweight, with a vintage look. Tri-blend made using a 4.3 oz blend of 50% polyester, 25% cotton, and 25% rayon jersey. Cotton made using 100% combed ring-spun cotton.