I anticipate that when we get to the future we'll attempt to understand how the future was shaped. I also assume that we will look back and attribute many of the changes to the liberal social engineers. Liberal social engineers are individuals attempting to change political and economic institutions but are primarily concerned with changing social norms. Liberal social engineers in the most superficial analysis attempt to take power away from those who have had it for so long and disperse it amongst the many marginalized groups of society. While they attempt to shape the present, they will ultimately be responsible for the future. Also, social engineers do not label themselves 'social engineers' but I presume we might one day label them as the engineers of our culture.
Here's one example of the work of liberal social engineers:
By changing the way people act, we can affect future generations' socially learnt dispositions.