Massachusetts is an equitable distribution jurisdiction. Equitable distribution means that there is a fair and reasonable division of all marital property, including everything each of you brought into your marriage, everything accumulated during your marriage, and everything inherited during your marriage. An equitable distribution may not be equal, and often it is not; the determination is governed by Massachusetts General Laws Chapter 208 Section 34.
There are only nine community property states in the United States: Arizona, California, Idaho, Louisiana, Nevada, New Mexico, Texas, Washington, and Wisconsin. In a community property jurisdiction, half of everything accumulated during a marriage goes to each party. No such rule applies in Massachusetts.