Wealth creation refers to the amassing of assets and property that is a surplus to the requirement for survival. This surplus, or wealth, may be used to amass an even greater surplus to the requirement via the further acquisition of resources and means of production.
Wealth creation accounts for many of the inequalities within and between nations. During the Industrial Revolution, for example, the countries now referred to as "developed" were able to acquire a surplus of resources thanks to the technological innovations that made production more efficient.
Wealth creation is a more appropriate term than wealth acquisition because there is not, in theory, a limited supply of wealth to go around; it is created by entrepreneurs and grown.