First I don't understand that what is order and disorder, as said that thermal equilibrium is disorder, but for equilibrium there is only one state, but 1st law of themodynamics says that a state with larger no. of microstate is much probable than one with less no. So equilibrium can be only in one way, so should not it be order. Now big bang is said to be most ordered state, as chaos started after it, but if it was ordered what the 2.73 K microwave background? This is same everywhere so there must be equilibrium, so we must be in state of disorder. Also, to measure chaos, we need two different states to compare, means we need "time" for chaos to be meaningful. Does this means chaos is property of time? And as time started at big bang so rather say chaos is property of big bang?