Important mechanisms to name a few probably were:
1)The spontaneous creation of complex organic molecules from simple molecules in proto-earth.
2)The 3D complexity of very long organic biomolecules, which in combination with external energy can create complex chemical systems that are difficult to reach equilibrium. Also, these molecules can react with simpler compounds (CaCO3, amino acids, etc) and create other molecules with ridiculously complex 3D spatial conformations like them and increase the available for life chemical reservoir.
3)The natural history of reactions favors (and in a way select) the most stable systems. For example, adhesive properties can make systems endure external events, hydrophobicity can create membranes, pores, etc, which can protect and sequester reactions, deoxyribonucleic acids, and their packaging can lead to relatively stable structures, etc.
4)The fact that we are the observers of the whole phenomenon gives us a specific viewpoint that can be deceiving. I will explain:
a)We don't realize the unfathomable amount of chemical reactions and events that happen even in a tiny bit of living material. Every chemical reaction in life happens for a natural reason. There is locally no purpose in them, they are natural events. However, we don't see plain reactions, we see for example mitochondria, cells, etc.
b)Life from a strictly biochemical perspective is a sum of chemical systems that interact. From a biochemical standpoint, there is not such a thing as an individual organism. This is probably a result of the need for the human brain to organize and understand systems. Thus, we think that living systems can create order, while in fact life as a whole, if we even include for example death, food, and nutrient recycling is a much more disordered system overall, exactly like all spontaneously forming chemical systems.All Rights Reserved