Complex sentence: You have to experience the entirety of the theatre and if you were to be in Greece in those times nudity was often around and was quite common as in comparison with today's 21sty century with named clothes and the want for all things materialistic.
Split into simpler sentences: You have to experience the entirety of the theatre and if you were to be in Greece in those times nudity was often around and was quite common. Where as in comparison with today's 21sty century with named clothes and the want for all things materialistic.