Does Reality Have A Liberal Bias?

This is a link supporting the hypothesis that the historical progress of human rights has come from activism from the left, or liberal, side of the political spectrum:

http://thehumanist.com/magazine/september-october-2015/up-front/the-tide-of-history-flows-left

Many people have heard the meme, "Reality has a liberal bias."  How true is this?  Following are several links in support of that hypothesis.  What do you think?  If you disagree, please counter with evidence only.

http://krugman.blogs.nytimes.com/2014/04/18/on-the-liberal-bias-of-facts/?_r=0

http://rationalwiki.org/wiki/Liberal_bias

http://www.huffingtonpost.com/bill-swadley/reality-has-a-liberal-bia_1_b_835631.html

http://evolvingthoughts.net/2011/06/is-reality-liberal-biased-are-liberals-reality-biased/

http://respectfulatheist.blogspot.com/2012/11/reality-has-well-known-liberal-bias.html

http://oursalon.ning.com/profiles/blogs/reality-has-a-liberal-bias

Oh, by the way, most Americans are liberal, even if they don't know it.