Indentured servants were a British Colonies thing. It ended with the American Revolution began. There was no Democrat Party at the time. There were no political parties whatsoever. There was the British Crown, and that was it.
Divide and conquer was also British thing.
Take India, again, for example. Hindus, Muslims, Buddhists, Confucians, Sikhs, Christians, Jews and whatever other religions plus other races and hundreds of ethnicities got along well throughout the subcontinent. The English exploited their differences, highlighting them, in order to prevent people from uniting against them. Once British rule ended, Hindus and Muslims clashed, and rather bloodily, necessitating the formation of Pakistan in order to separate people in what was once a mixed culture for thousands of years.
Darwin was also English. That's where he was from. That's where he resided. That's why his (stolen) theories had evolution culminating in Angliman.