I'm not positive that this belongs in the philosophy section but I'm not really sure that it belongs in physics or anywhere else either. For too long I've been trying to unify the fundamentals laws of the universe and those laws that govern how life behaves and how the planets behave. And what I've finally come down to is interactive forces. Without the interaction of the forces between subatomic particles nothing would exist as we know it. If you could define happiness as a force then it would act upon another force such as sadness. If the happiness is stronger than the sadness then happiness will prevail over the weaker and dominate and vice versa. Such as when compared to a strong negative magnitization and a weak positive magintization. The negative will dominate due to strength alone. Some forces are fundamentally stronger than others such as anger and depression. This interactivity of these forces is not much diffrent from what is happening when comparing magnetism and gravity. The stronger magnetic force will over come the weaker gravitational force with comparable ease. Similarly when anger confronts happiness it will generally dominate it. This does not mean that the anger will beat the happiness only that it has the strength to change it completely. Another example of this is fear. Fear is a very strong force. Fear can alter another force even anger. In all this I am not saying that fundamental forces are guided by the same laws as such forces as fear and anger but rather that it is by these interactions that life and even existence itself is even possible. I know that one could ask what drives the forces? Where do these forces come from? But for the sake of this particular post I do not what to delve into metaphysics. Evolution did not begin with life. Evolution began with existence.