Clearly when the liberties are left unrestricted they collide with one another.

There are infinitely many variations of the initial situation and therefore no doubt indefinitely many theorems of moral geometry.

Certainly it is wrong to be cruel to animals and the destruction of a whole species can be a great evil. The capacity for feelings of pleasure and pain and for the form of life of which animals are capable clearly impose duties of compassion and humanity in their case.

In constant pursuit of money to finance campaigns, the political system is simply unable to function. Its deliberative powers are paralyzed.

An injustice is tolerable only when it is necessary to avoid an even greater injustice.

Justice is the first virtue of social institutions.

There are two kinds of comprehensive doctrines, religious and secular. Those of religious faith will say I give a veiled argument for secularism, and the latter will say I give a veiled argument for religion. I deny both. Each side presumes the basic ideas of constitutional democracy, so my suggestion is that we can make our political arguments in terms of public reason. Then we stand on common ground. That's how we can understand each other and cooperate.