slavery and feudalism

1- Discuss the difference in the slave and feudal forms of labor- 2- How was he surplus produced under slavery and feudalism? 3- Howard Sherman writes, Rather than being inevitable, technological progress happens only when the social and economic institutions and the dominant ideology encourage it to improve-First, Roman economic institutions, the dominant Roman ideology, and Roman social institutions were permeated with slavery and its related effects- These institutions and ideology based on slavery resulted in technological stagnation-" How Society Makes Itself. Page 44 Explain! 4- What inhibited technological change in feudalism      

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