A monolithic slab, like a giant incarnation of a Biblical tablet of stone, dominates Mark Thompson’s set for Jamie Lloyd's production of the third play by Alexi Kaye Campbell. Nothing else is so solid in this big, weighty work, which wrestles with abstract notions of faith, the human soul and the myths and narratives by which we choose to live.

For a couple of years now British theatre has been harvesting a new crop of young female talent. Market leaders such as Lucy Prebble (Enron) and Polly Stenham (That Face) have made a splash in the West End, and where they led many others have followed.

"Love comes now. You have to start with love," urges Sarah Kahn (Samantha Spiro) early in Chicken Soup With Barley, and it's inconceivable that Dominic Cooke's knockout production of Arnold Wesker's 1958 play could have sprung from any other starting point. There's talk later in Wesker's three acts (taken here with only one interval) of seeing people in the round, which is exactly what the writing, not to mention Cooke's superlative ensemble, manages to do: the political and the personal conjoined in a compassion that one might describe as clear-eyed if only it didn't prompt from an audience such honestly earned tears.

Anya Reiss must be the most precocious playwright in London. Her 2010 debut, Spur of the Moment, written while she was just 17 and still studying for her A levels, won two Most Promising Playwright awards, from the London Evening Standard and the Critics’ Circle.

Wastwater is the deepest lake in England, overshadowed by rugged Cumbrian screes and described by Wordsworth as “long, stern and desolate”. In this new play by Simon Stephens, directed by Katie Mitchell, it becomes a central metaphor: terrors may lie beneath its dark, still surface, like the violence and secret suffering behind a suburban front door.

British theatre is a bit phobic about travel: you can see plenty of plays set in leafy suburbs, grotty council estates and occasionally in muddy fields, but few that enjoy an overseas setting. And when the Brits do go abroad, they usually follow the well-trodden paths to Africa, the Middle East and north America. But the Royal Court has a different agenda: it works with playwrights abroad and brings their work to Sloane Square so there’s no need to get a visa to experience life in today’s Latvia, as shown in Aleksey Scherbak’s new play, which opened here last night.

Andrea Dunbar’s story was extremely grim when first told in her 1980 play The Arbor (I’m unable to explain why, for a leafy retreat in so English a context - however decimated - the American spelling is used) and it remains so: a medieval catalogue of domestic abuse, alcoholism, racism, stupidity and misery bordering on caricature. Was it really so bad in Bradford in the 1970s? Apparently so. Is it still? I’ve no idea.

From being virtually ignored by theatres and playwrights, the issue of climate change now threatens to swamp the programmes of our flagship theatres. If this is a good thing, meaning that the heat has been turned up on the debate, can public interest be maintained at this rate? Is the topic at all sustainable? After Greenland opened at the National Theatre last week, now it’s the turn of Richard Bean’s new play, which had its premiere at the Royal Court last night, in a production starring the superb Juliet Stevenson. And if the National's contribution to the debate was a bit too cool, Bean's play is much hotter.

From being virtually ignored by theatres and playwrights, the issue of climate change now threatens to swamp the programmes of our flagship theatres. If this is a good thing, meaning that the heat has been turned up on the debate, can public interest be maintained at this rate? Is the topic at all sustainable? After Greenland opened at the National Theatre last week, now it’s the turn of Richard Bean’s new play, which had its premiere at the Royal Court last night, in a production starring the superb Juliet Stevenson. And if the National's contribution to the debate was a bit too cool, Bean's play is much hotter.

One expects Shakespeare to be rediscovered afresh on the British stage (if not here, where?), and it was gratifying during 2010 to find the Royal Court - a venue all about the new - raising the authorial bar ever higher via an (almost) unbroken series of triumphs culminating, for me, with E V Crowe's Kin.

Incongruence is always interesting, so the news earlier this year that Anthony Neilson, bad-boy author of adult plays such as Penetrator, The Censor and The Wonderful World of Dissocia, was penning a Christmas play — suitable for kids — at the Royal Court came as something of a delightful surprise. It was also clearly a chance to make amends for The Lying Kind, his 2002 seasonal venture at this address, which received what are politely called mixed reviews. This time, it's good to be able to report that his new festive comedy, which opened last night amid gales of laughter, proves that he has returned to top form.