人类存在论：意义何以在无目的宇宙中发生——从选择性因果到反思主体

中文摘要

现代宇宙学极大拓展了人类自我理解的尺度，也使一个古老问题变得更加尖锐：在一个没有充分证据表明具有预设目的、价值偏好和人格化意志的宇宙中，人类何以能够追问意义，并为自身存在赋予价值？本文试图建构一种宇宙尺度下的人类存在论。其基本判断是：人类不是被置入宇宙的外部观察者，而是宇宙内部局部物质演化已经现实形成的反思性存在。就已知自然史而言，可以回溯出一条连续但具有层级跃迁的发生链：宇宙物质在局部形成能够同时维持能量流动与复杂结构保存的环境，前生命化学与早期生命由此成为现实可能，生命继而经过自维持、复制、变异与选择形成多层次组织，并在部分动物谱系中发展出神经系统、记忆、社会互动与符号能力，最终在人类这里形成能够把自身欲望、规范乃至存在本身作为对象的反思主体。本文主张的是这一已经发生之链条的发生事实确定性，而非“任何适宜环境都必然产生人类”的事前模态必然性。为解释这条链条的组织逻辑，本文进一步区分状态趋向与选择性因果、生命内生调控、价性感受、情感记忆、符号表征和反思性对象化。由此，人的存在呈现为自然规定性与反思超越性之间的双重结构：人无法取消身体、欲望、死亡与历史条件，却能够重新组织对部分条件的回应，从而形成有限自由。演化所解释的不是何种价值必然正确，而是价值判断与意义建构何以在人类这种宇宙内部的反思性存在中发生

Abstract

Modern cosmology has vastly expanded the scale of human self-understanding while sharpening an ancient question: in a universe with no sufficient evidence of preset purpose, value preferences, or personified will, how can human beings raise the question of meaning and endow their own existence with value? This paper attempts to construct an ontology of human existence at cosmic scale. Its basic judgment is that human beings are not external observers placed into the universe, but reflexive beings that the local evolution of matter within the universe has actually formed. As far as known natural history is concerned, one can trace a continuous genesis chain with hierarchical transitions: cosmic matter locally formed environments able to sustain both energy flow and the preservation of complex structure; prebiotic chemistry and early life thereby became actual possibilities; life then formed multi-level organization through self-maintenance, replication, variation, and selection; some animal lineages developed nervous systems, memory, social interaction, and symbolic capacities; and finally, in human beings, a reflexive subject emerged capable of taking its own desires, norms, and even existence itself as objects. The paper asserts the factual certainty of this already-occurred chain as an event of genesis, not the a priori modal necessity that "any suitable environment must necessarily produce human beings." To explain the organizational logic of the chain, it further distinguishes state-directedness from selective causation, endogenous organismic regulation, valence feeling, affective memory, symbolic representation, and reflexive objectification. Human existence thereby presents a dual structure of natural determination and reflexive transcendence: humans cannot annul body, desire, death, or historical conditions, yet can reorganize their responses to some of these conditions, forming a finite freedom. Evolution explains not which values are necessarily correct, but how value judgment and meaning-construction occur in human beings as reflexive existents within the cosmos.

关键词：人类存在论；宇宙发生链；意义建构；选择性因果；反思主体；有限自由

Keywords: Ontology of human existence; cosmic genesis chain; meaning construction; selective causation; reflexive subject; finite freedom