Despite the worthy aspects of building a writer's platform, the most productive force for a new writer is word of mouth. (authormarketingclub.com)
The general contradiction between productive forces and productive relationships emerges most sharply, however, when they are most advanced. (religion-online.org)
The decisive productive force of history is the human person at work in all the spheres of creative activity: in production, discovery, invention, artistic creation, political and moral decisions. (religion-online.org)