In the good old days of the industrial economy, assessing individual contributions was simple. You count pieces produced: widgets made, memos typed, packages delivered, pupils passed, holes dug, medications distributed, materials mined, structures built.
In a social economy, overall impacts are primary determined by the quality of relationships rather than individual efforts because knowledge is the fundamental resource for individual and collective efforts and knowledge is more a function of relationships than isolation. In the industrial model, keeping people undistracted by others was considered key to productivity. In this era, being better individually is a function of being smarter together.