Text is annoying to read when it's too narrow, yours is too narrow. Bumping it up from 500px to 800px makes it look less sparse and is still readable.
For the centering, margin: 0 auto; on .textWrapper is an improvement.
Goes against the MD style of the homepage.. trying to find another solution.
Making the content 800px wide and setting the margin the same way looked perfectly fine on both the blog post and the home page, much better than all the way to the left and smaller.