Introduction There are two types of social equilibrium that is dynamic and static equilibriums, abnormal and normal equilibriums the first is active, the second is passive.the first is unstable and the second is stable Equilibrium is the spot where consumers and producers exchange services and goods at a quantity and cost that signify a balance among the consumer’s desire to forfeit less cash and the producer’s desire to get more cash. It is the point at which everybody prepared to pay the price of the market gets their demand satisfied, while anybody prepared to manufacture at the price of the market gets a buyer for the service or good. [Roger 2001] A market can be defined as an area where services and goods are exchanged. One can imagine a bustling lane complete of sellers and buyers or a stock trade full of citizens selling and buying stocks. These are touchable manifestations of a market. Economics can be defined as a communal discipline which checks the distribution, consumption and production of services and goods. Microeconomics can be defined as a tool that examines the performance of fundamental elements in the financial system including personalized agents or markets, that is, firms and consumers, sellers and buyers. [William and Alain 2006] Macroeconomics can be defined as a tool that addresses problems affecting the whole economy. That is, inflation, economic growth, unemployment and fiscal and monetary policy. Demand is a connection amidst two variables quantity and price demanded, with all other additional factors that may influence demand held steady. [Esther1998] How the Sonnenschein-Mantel-Debreu Theorem in General Equilibrium affect the law of demand and the law of demand The demand law In money matters can be defined as a microeconomic commandment which states; ‘As the price of a service or good increases, consumer demand for the service or good will decrease and as the price of a service or good decreases, consumer demand for service or good will increase. When all the other factors remain unchanged. [Irvin 2011] Below is a graph illustrating the law of demand? Source: (Rick Kash 2002) From the graph it can be seen clearly that when the price increase from P3 to P2 the demand falls from Q2 to Q3 consequently when the price decreases from P1 to P2, the demand increases from Q2 TO Q1. According to Investopedia, law of demand shows the consequences that price variations have on consumer actions. For example, a consumer will purchase more burgers if the price of the burgers falls. Relatively a consumer will purchase less burgers if the burgers price goes up or increases. That is the greater the amount sold, the smaller the price should be in order for it to get purchasers or buyers. For instance, if the price of milk goes up automatically the demand of milk goes down [Rick Kash 2002] .The Sonnenschein–Mantel–Debreu Theorem is named after four economists who are Gerard Debreu, Rolf Ricardo Mantel, and Hugo Freund Sonnenschein. As a result of general economics. It states; ‘The surplus demand function for an economy is not limited by the usual reasonableness restrictions on individual demands in the economy’.For example, if in a country’s economy the price of a commodity like petroleum goes high the demand for this particular commodity is not affected by restrictions of the individual demand this is because the customers will still u