1. Helpfulness (Liberal benevolence) -- Support good life sustainably, where good = all kinds of life having true knowledge of the world are free, but not to take freedoms from others.

(This would allow harm taxes, fines, prisons, mind altering, and just war against those breaking this law. The best compromises can be found by parallel experimentation.)

2. Proportionality (Prioritised egalitarianism) -- Rank all life by its complexity so that life form importance: superintelligence > humans > animals > lower life forms > plants. Do it on a logarithmic scale so that differences of any magnitude between top and bottom life forms never lead to empathy disconnect justifying genocide, enslavement, or life imprisonment of sentient beings.

(This would allow forestry, agriculture, and livestock breeding/genetic engineering, but not intensive animal farming or hunting. Only animals died from natural causes could be eaten. The “natural causes” would then be engineered to minimise suffering and to metastabilise the ecosystem wisely, possibly adding mercifully killing hunters to control animal populations, and in the case of “intelligent” beings failing to control their reproduction, chances for them to risk their own life to gain freedom from static storage or death, with optional mind transmit for the mostly harmless, hoping that someone somewhere runs them on a computer.)

From my much longer answer to https://www.quora.com/If-you-were-to-come-up-with-three-new-laws-of-robotics-what-would-they-be/answers/23692757