Grammar help? can someone help me find the error is this vvv or things i should changes thanks a ton:)?

Flashing lights, with everything bright, shiny and new, should not be the way to influence people. The 21st century has given the world new and more convenient ways of doing things, from surgery to getting information. I feel including these technologies in a presentation would not improve it, but instead destroy it. A presentation should only comprise words and phrases needed to get the point across. Prominent leaders like Patrick Henry, Martin Luther King Jr., and Princess Diana did not use technology to influence others and start revolutions, civil rights acts, and touch the lives of the sick and of everyday people. Their ideas, thoughts, and amiability, put into words and spoken, created an amalgam of people to fight for what’s right; bringing autonomy and justice out of the clouds and into the light. These leaders showed people the realities of their time and what they could do to make it better. In summary, I feel giving a presentation relies simply on a person’s way with words, affinity with people, and ability to capture people’s hearts and lift their hopes in a time of need. A presentation does not need the ostentation that comes with technology. All a presentation needs is an altruistic, affable person, with sublime words and characteristics. I will conclude with a quote of mine: a simple demeanor expressed through noble appeals has more value than glamour filled with lies