Meryl Streep had long, un-processed, natural hair to die for in the 1970’s. To have healthy, beautiful hair, ideally you should avoid coloring or other processes and hot tools. In today’s day and age though, it’s hard not to want to experiment with colors or styles. To emulate this look (without a drastic commitment) try to be gentle with your hair. This means condition often, let it air dry and avoid styling with heat.