In Chinese thought, the concept of `共存` is deeply connected to the value of 和谐 (héxié) - harmony. It's not just about tolerating others, but about recognizing that different elements can and should exist together to create a balanced and complete whole. This applies to nature, society, and even international relations. A useful Western comparison is the “salad bowl” vs. “melting pot” analogy for multiculturalism. The American “melting pot” ideal suggests that different cultures should assimilate and merge into one. `共存`, however, is much closer to the “salad bowl” concept: different ingredients (cultures, ideas, entities) are all in the same bowl and make a great salad together, but a carrot remains a carrot and a lettuce leaf remains a lettuce leaf. They exist together, retaining their unique identities, to form a richer whole. This principle is most famously expressed in China's foreign policy through the “Five Principles of Peaceful Coexistence” (和平共存五项原则), which emphasizes mutual respect for sovereignty and non-interference, allowing different political systems to exist side-by-side.
`共存` is a versatile term used in formal and slightly academic contexts. You'll see it in the news, in nature documentaries, and in discussions about society and policy.