Five years ago this coming summer Hillary Clinton gave the best speech of her life. Unfortunately it was her concession speech, allowing Barack Obama to become the Democratic National Party’s candidate and ultimately President. But she gave eloquence to the much-used “glass ceiling” phrase about women’s barriers to success by noting that there were now, thanks to her supporters, “eighteen million cracks” in it. We know all about the shortage of women breaking through boardroom barriers and political barriers now. Change is in the air. The F-word (feminism) is back in vogue, being argued and debated with a passion not seen since the 1970s. Good. But where are women’s voices about the big ideas in society? In business? Where are the women with books like ‘Outliers’, ‘Nudge’ and ‘The Switch’? I greatly admire and envy writers and thinkers such as the Heath Brothers, Steven Johnson, Malcolm Gladwell, Daniel Pink, Daniel Kahneman. Big ideas from Big Blokes. But women are cracking through the ideas barriers at a great speed and I welcome this. Here’s some of my favourite women thinkers and their books I recommend: Jane McGonigal’s Reality is Broken : Why Games Make us Better and How They Can Change the World; Sherry Turkle’s Alone Together:Why We Expect More from Technology and Less from Each Other and Susan Blackmore’s extraordinary ‘The Meme Machine’; Susan Cain’s Quiet: The Power of Introverts in a World That Can’t Stop Talking. There are millions of women out there with millions of great ideas. Let’s hear more of them, from more of us.