Marx's thoughts on labour were related to the primacy he gave to the economic relation in determining the society's past, present and future (see also economic determinism). Accumulation of capital shapes the social system. For Marx, social change was about conflict between opposing interests, driven in the background by economic forces. This became the inspiration for the body of works known as the conflict theory. In his evolutionary model of history, he argued that human history began with free, productive and creative work that was over time coerced and dehumanised, a trend most apparent under capitalism. Marx noted that this was not an intentional process, rather no individual or even state can go against the forces of economy.