G. K. Chesterton observed, 95 years ago, that animal worship and human sacrifice go hand in hand. He could have been commenting on recent news about Cecil the lion and about Planned Parenthood.
Wherever there is Animal Worship there is Human Sacrifice. That is, both symbolically and literally, a real truth of historical experience.
Source: Abortion & Animal Welfare — G. K. Chesterton Was Prescient