Final answer:
According to Vere Gordon Childe, religion and warfare were the two cultural practices that most influenced human existence.
Step-by-step explanation:
According to Vere Gordon Childe, two cultural practices that most influenced human existence are religion and the concept of culture itself. Religion has been and continues to be a universal feature of human societies, providing answers to life's big questions and contributing to a sense of order. While Childe did not explicitly name the second cultural practice in the provided reference, the text suggests the significant role of culture in shaping human existence. Culture, as defined by Edward Burnett Tylor, encompasses a vast array of human activities and beliefs, including knowledge, art, morals, laws, customs, and more. It reflects the intrinsic nature of the cosmos, aligns humanity with it, and offers a sense of merit through family traditions and achievements, indicating its profound impact on human behavior and societal development.